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Finding the Fourth Proportional to 121,117.60, 181,503.60 and 89,279.20

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Solution

The fourth proportional to 121,117.60, 181,503.60 and 89,279.20 is: 133,791.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,117.60 : 181,503.60 = 89,279.20 : x
  2. Step 2: Convert to fraction form
    121,117.60/181,503.60 = 89,279.20/x
  3. Step 3: Cross multiply
    121,117.60x = 181,503.60 × 89,279.20
  4. Step 4: Simplify right side
    121,117.60x = 16,204,496,205.12
  5. Step 5: Solve for x
    x = 16,204,496,205.12/121,117.60
  6. Step 6: Final answer
    x = 133,791.42

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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.