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Finding the Fourth Proportional to 89,711.88, 134,475.45 and 39,815.47

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Solution

The fourth proportional to 89,711.88, 134,475.45 and 39,815.47 is: 59,682.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,711.88 : 134,475.45 = 39,815.47 : x
  2. Step 2: Convert to fraction form
    89,711.88/134,475.45 = 39,815.47/x
  3. Step 3: Cross multiply
    89,711.88x = 134,475.45 × 39,815.47
  4. Step 4: Simplify right side
    89,711.88x = 5,354,203,245.21
  5. Step 5: Solve for x
    x = 5,354,203,245.21/89,711.88
  6. Step 6: Final answer
    x = 59,682.21

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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.