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Finding the Fourth Proportional to 261,918.60, 392,877.90 and 74,930.10

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Solution

The fourth proportional to 261,918.60, 392,877.90 and 74,930.10 is: 112,395.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,918.60 : 392,877.90 = 74,930.10 : x
  2. Step 2: Convert to fraction form
    261,918.60/392,877.90 = 74,930.10/x
  3. Step 3: Cross multiply
    261,918.60x = 392,877.90 × 74,930.10
  4. Step 4: Simplify right side
    261,918.60x = 29,438,380,334.79
  5. Step 5: Solve for x
    x = 29,438,380,334.79/261,918.60
  6. Step 6: Final answer
    x = 112,395.15

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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.