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Finding the Fourth Proportional to 89,712.80, 134,421.60 and 54,546.56

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Solution

The fourth proportional to 89,712.80, 134,421.60 and 54,546.56 is: 81,730.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,712.80 : 134,421.60 = 54,546.56 : x
  2. Step 2: Convert to fraction form
    89,712.80/134,421.60 = 54,546.56/x
  3. Step 3: Cross multiply
    89,712.80x = 134,421.60 × 54,546.56
  4. Step 4: Simplify right side
    89,712.80x = 7,332,235,869.70
  5. Step 5: Solve for x
    x = 7,332,235,869.70/89,712.80
  6. Step 6: Final answer
    x = 81,730.10

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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.