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Finding the Fourth Proportional to 261,237.91, 391,861.73 and 74,254.27

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Solution

The fourth proportional to 261,237.91, 391,861.73 and 74,254.27 is: 111,382.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,237.91 : 391,861.73 = 74,254.27 : x
  2. Step 2: Convert to fraction form
    261,237.91/391,861.73 = 74,254.27/x
  3. Step 3: Cross multiply
    261,237.91x = 391,861.73 × 74,254.27
  4. Step 4: Simplify right side
    261,237.91x = 29,097,406,702.09
  5. Step 5: Solve for x
    x = 29,097,406,702.09/261,237.91
  6. Step 6: Final answer
    x = 111,382.79

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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.