Home / 138,805.39-191,551.50-75,143.18

Finding the Fourth Proportional to 138,805.39, 191,551.50 and 75,143.18

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Solution

The fourth proportional to 138,805.39, 191,551.50 and 75,143.18 is: 103,697.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,805.39 : 191,551.50 = 75,143.18 : x
  2. Step 2: Convert to fraction form
    138,805.39/191,551.50 = 75,143.18/x
  3. Step 3: Cross multiply
    138,805.39x = 191,551.50 × 75,143.18
  4. Step 4: Simplify right side
    138,805.39x = 14,393,789,040.86
  5. Step 5: Solve for x
    x = 14,393,789,040.86/138,805.39
  6. Step 6: Final answer
    x = 103,697.63

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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.