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Finding the Fourth Proportional to 99,197.60, 148,640.87 and 84,345.44

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Solution

The fourth proportional to 99,197.60, 148,640.87 and 84,345.44 is: 126,385.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,197.60 : 148,640.87 = 84,345.44 : x
  2. Step 2: Convert to fraction form
    99,197.60/148,640.87 = 84,345.44/x
  3. Step 3: Cross multiply
    99,197.60x = 148,640.87 × 84,345.44
  4. Step 4: Simplify right side
    99,197.60x = 12,537,179,049.79
  5. Step 5: Solve for x
    x = 12,537,179,049.79/99,197.60
  6. Step 6: Final answer
    x = 126,385.92

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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.