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Finding the Fourth Proportional to 89,187.90, 133,781.85 and 81,023.10

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Solution

The fourth proportional to 89,187.90, 133,781.85 and 81,023.10 is: 121,534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,187.90 : 133,781.85 = 81,023.10 : x
  2. Step 2: Convert to fraction form
    89,187.90/133,781.85 = 81,023.10/x
  3. Step 3: Cross multiply
    89,187.90x = 133,781.85 × 81,023.10
  4. Step 4: Simplify right side
    89,187.90x = 10,839,420,210.74
  5. Step 5: Solve for x
    x = 10,839,420,210.74/89,187.90
  6. Step 6: Final answer
    x = 121,534.65

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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.