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Finding the Fourth Proportional to 359,713.20, 539,509.28 and 131,961.76

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Solution

The fourth proportional to 359,713.20, 539,509.28 and 131,961.76 is: 197,920.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,713.20 : 539,509.28 = 131,961.76 : x
  2. Step 2: Convert to fraction form
    359,713.20/539,509.28 = 131,961.76/x
  3. Step 3: Cross multiply
    359,713.20x = 539,509.28 × 131,961.76
  4. Step 4: Simplify right side
    359,713.20x = 71,194,594,125.13
  5. Step 5: Solve for x
    x = 71,194,594,125.13/359,713.20
  6. Step 6: Final answer
    x = 197,920.44

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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.