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Finding the Fourth Proportional to 88,780.80, 132,766.68 and 66,307.20

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Solution

The fourth proportional to 88,780.80, 132,766.68 and 66,307.20 is: 99,158.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,780.80 : 132,766.68 = 66,307.20 : x
  2. Step 2: Convert to fraction form
    88,780.80/132,766.68 = 66,307.20/x
  3. Step 3: Cross multiply
    88,780.80x = 132,766.68 × 66,307.20
  4. Step 4: Simplify right side
    88,780.80x = 8,803,386,804.10
  5. Step 5: Solve for x
    x = 8,803,386,804.10/88,780.80
  6. Step 6: Final answer
    x = 99,158.68

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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.