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Finding the Fourth Proportional to 89,843.90, 134,506.65 and 80,512.70

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Solution

The fourth proportional to 89,843.90, 134,506.65 and 80,512.70 is: 120,536.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,843.90 : 134,506.65 = 80,512.70 : x
  2. Step 2: Convert to fraction form
    89,843.90/134,506.65 = 80,512.70/x
  3. Step 3: Cross multiply
    89,843.90x = 134,506.65 × 80,512.70
  4. Step 4: Simplify right side
    89,843.90x = 10,829,493,559.46
  5. Step 5: Solve for x
    x = 10,829,493,559.46/89,843.90
  6. Step 6: Final answer
    x = 120,536.77

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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.