Home / 145,300.38-218,278.67-86,174.84

Finding the Fourth Proportional to 145,300.38, 218,278.67 and 86,174.84

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Solution

The fourth proportional to 145,300.38, 218,278.67 and 86,174.84 is: 129,456.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,300.38 : 218,278.67 = 86,174.84 : x
  2. Step 2: Convert to fraction form
    145,300.38/218,278.67 = 86,174.84/x
  3. Step 3: Cross multiply
    145,300.38x = 218,278.67 × 86,174.84
  4. Step 4: Simplify right side
    145,300.38x = 18,810,127,940.40
  5. Step 5: Solve for x
    x = 18,810,127,940.40/145,300.38
  6. Step 6: Final answer
    x = 129,456.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.