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Finding the Fourth Proportional to 261,439.56, 392,224.92 and 74,451

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Solution

The fourth proportional to 261,439.56, 392,224.92 and 74,451 is: 111,695.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,439.56 : 392,224.92 = 74,451 : x
  2. Step 2: Convert to fraction form
    261,439.56/392,224.92 = 74,451/x
  3. Step 3: Cross multiply
    261,439.56x = 392,224.92 × 74,451
  4. Step 4: Simplify right side
    261,439.56x = 29,201,537,518.92
  5. Step 5: Solve for x
    x = 29,201,537,518.92/261,439.56
  6. Step 6: Final answer
    x = 111,695.18

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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.