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Finding the Fourth Proportional to 261,377.64, 392,098.86 and 74,403.72

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Solution

The fourth proportional to 261,377.64, 392,098.86 and 74,403.72 is: 111,614.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,377.64 : 392,098.86 = 74,403.72 : x
  2. Step 2: Convert to fraction form
    261,377.64/392,098.86 = 74,403.72/x
  3. Step 3: Cross multiply
    261,377.64x = 392,098.86 × 74,403.72
  4. Step 4: Simplify right side
    261,377.64x = 29,173,613,791.76
  5. Step 5: Solve for x
    x = 29,173,613,791.76/261,377.64
  6. Step 6: Final answer
    x = 111,614.80

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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.