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Finding the Fourth Proportional to 159,907.50, 220,691.79 and 92,839.50

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Solution

The fourth proportional to 159,907.50, 220,691.79 and 92,839.50 is: 128,129.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,907.50 : 220,691.79 = 92,839.50 : x
  2. Step 2: Convert to fraction form
    159,907.50/220,691.79 = 92,839.50/x
  3. Step 3: Cross multiply
    159,907.50x = 220,691.79 × 92,839.50
  4. Step 4: Simplify right side
    159,907.50x = 20,488,915,437.71
  5. Step 5: Solve for x
    x = 20,488,915,437.71/159,907.50
  6. Step 6: Final answer
    x = 128,129.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.