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Finding the Fourth Proportional to 88,906.20, 133,432.20 and 85,990.20

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Solution

The fourth proportional to 88,906.20, 133,432.20 and 85,990.20 is: 129,055.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,906.20 : 133,432.20 = 85,990.20 : x
  2. Step 2: Convert to fraction form
    88,906.20/133,432.20 = 85,990.20/x
  3. Step 3: Cross multiply
    88,906.20x = 133,432.20 × 85,990.20
  4. Step 4: Simplify right side
    88,906.20x = 11,473,861,564.44
  5. Step 5: Solve for x
    x = 11,473,861,564.44/88,906.20
  6. Step 6: Final answer
    x = 129,055.81

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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.