Home / 138,354.84-207,331.38-75,121.38

Finding the Fourth Proportional to 138,354.84, 207,331.38 and 75,121.38

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Solution

The fourth proportional to 138,354.84, 207,331.38 and 75,121.38 is: 112,573.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,354.84 : 207,331.38 = 75,121.38 : x
  2. Step 2: Convert to fraction form
    138,354.84/207,331.38 = 75,121.38/x
  3. Step 3: Cross multiply
    138,354.84x = 207,331.38 × 75,121.38
  4. Step 4: Simplify right side
    138,354.84x = 15,575,019,382.90
  5. Step 5: Solve for x
    x = 15,575,019,382.90/138,354.84
  6. Step 6: Final answer
    x = 112,573.00

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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.