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Finding the Fourth Proportional to 121,123.60, 181,512.60 and 89,285.20

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Solution

The fourth proportional to 121,123.60, 181,512.60 and 89,285.20 is: 133,800.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,123.60 : 181,512.60 = 89,285.20 : x
  2. Step 2: Convert to fraction form
    121,123.60/181,512.60 = 89,285.20/x
  3. Step 3: Cross multiply
    121,123.60x = 181,512.60 × 89,285.20
  4. Step 4: Simplify right side
    121,123.60x = 16,206,388,793.52
  5. Step 5: Solve for x
    x = 16,206,388,793.52/121,123.60
  6. Step 6: Final answer
    x = 133,800.42

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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.