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Finding the Fourth Proportional to 261,675.12, 392,470.56 and 74,642.88

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Solution

The fourth proportional to 261,675.12, 392,470.56 and 74,642.88 is: 111,952.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,675.12 : 392,470.56 = 74,642.88 : x
  2. Step 2: Convert to fraction form
    261,675.12/392,470.56 = 74,642.88/x
  3. Step 3: Cross multiply
    261,675.12x = 392,470.56 × 74,642.88
  4. Step 4: Simplify right side
    261,675.12x = 29,295,132,913.61
  5. Step 5: Solve for x
    x = 29,295,132,913.61/261,675.12
  6. Step 6: Final answer
    x = 111,952.31

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1.5x scale

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.