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Finding the Fourth Proportional to 89,711.90, 134,543.55 and 26,531.90

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Solution

The fourth proportional to 89,711.90, 134,543.55 and 26,531.90 is: 39,790.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,711.90 : 134,543.55 = 26,531.90 : x
  2. Step 2: Convert to fraction form
    89,711.90/134,543.55 = 26,531.90/x
  3. Step 3: Cross multiply
    89,711.90x = 134,543.55 × 26,531.90
  4. Step 4: Simplify right side
    89,711.90x = 3,569,696,014.25
  5. Step 5: Solve for x
    x = 3,569,696,014.25/89,711.90
  6. Step 6: Final answer
    x = 39,790.66

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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.