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Finding the Fourth Proportional to 88,659.80, 132,989.70 and 60,666.20

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Solution

The fourth proportional to 88,659.80, 132,989.70 and 60,666.20 is: 90,999.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,659.80 : 132,989.70 = 60,666.20 : x
  2. Step 2: Convert to fraction form
    88,659.80/132,989.70 = 60,666.20/x
  3. Step 3: Cross multiply
    88,659.80x = 132,989.70 × 60,666.20
  4. Step 4: Simplify right side
    88,659.80x = 8,067,979,738.14
  5. Step 5: Solve for x
    x = 8,067,979,738.14/88,659.80
  6. Step 6: Final answer
    x = 90,999.30

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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.