Home / 258,143.38-356,239.29-143,422.18

Finding the Fourth Proportional to 258,143.38, 356,239.29 and 143,422.18

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Solution

The fourth proportional to 258,143.38, 356,239.29 and 143,422.18 is: 197,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,143.38 : 356,239.29 = 143,422.18 : x
  2. Step 2: Convert to fraction form
    258,143.38/356,239.29 = 143,422.18/x
  3. Step 3: Cross multiply
    258,143.38x = 356,239.29 × 143,422.18
  4. Step 4: Simplify right side
    258,143.38x = 51,092,615,573.45
  5. Step 5: Solve for x
    x = 51,092,615,573.45/258,143.38
  6. Step 6: Final answer
    x = 197,923.40

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Half scale
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Double scale
Find fourth proportional to 258,144.38, 356,240.67 and 143,423.18
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.