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Finding the Fourth Proportional to 88,885.20, 133,400.70 and 85,969.20

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Solution

The fourth proportional to 88,885.20, 133,400.70 and 85,969.20 is: 129,024.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,885.20 : 133,400.70 = 85,969.20 : x
  2. Step 2: Convert to fraction form
    88,885.20/133,400.70 = 85,969.20/x
  3. Step 3: Cross multiply
    88,885.20x = 133,400.70 × 85,969.20
  4. Step 4: Simplify right side
    88,885.20x = 11,468,351,458.44
  5. Step 5: Solve for x
    x = 11,468,351,458.44/88,885.20
  6. Step 6: Final answer
    x = 129,024.31

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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.