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Finding the Fourth Proportional to 89,167.40, 133,731.90 and 39,247.40

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Solution

The fourth proportional to 89,167.40, 133,731.90 and 39,247.40 is: 58,862.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,167.40 : 133,731.90 = 39,247.40 : x
  2. Step 2: Convert to fraction form
    89,167.40/133,731.90 = 39,247.40/x
  3. Step 3: Cross multiply
    89,167.40x = 133,731.90 × 39,247.40
  4. Step 4: Simplify right side
    89,167.40x = 5,248,629,372.06
  5. Step 5: Solve for x
    x = 5,248,629,372.06/89,167.40
  6. Step 6: Final answer
    x = 58,862.65

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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.