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Finding the Fourth Proportional to 121,159.60, 181,566.60 and 89,321.20

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Solution

The fourth proportional to 121,159.60, 181,566.60 and 89,321.20 is: 133,854.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,159.60 : 181,566.60 = 89,321.20 : x
  2. Step 2: Convert to fraction form
    121,159.60/181,566.60 = 89,321.20/x
  3. Step 3: Cross multiply
    121,159.60x = 181,566.60 × 89,321.20
  4. Step 4: Simplify right side
    121,159.60x = 16,217,746,591.92
  5. Step 5: Solve for x
    x = 16,217,746,591.92/121,159.60
  6. Step 6: Final answer
    x = 133,854.41

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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.