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Finding the Fourth Proportional to 99,684.80, 149,404.07 and 85,545.44

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Solution

The fourth proportional to 99,684.80, 149,404.07 and 85,545.44 is: 128,212.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,684.80 : 149,404.07 = 85,545.44 : x
  2. Step 2: Convert to fraction form
    99,684.80/149,404.07 = 85,545.44/x
  3. Step 3: Cross multiply
    99,684.80x = 149,404.07 × 85,545.44
  4. Step 4: Simplify right side
    99,684.80x = 12,780,836,905.94
  5. Step 5: Solve for x
    x = 12,780,836,905.94/99,684.80
  6. Step 6: Final answer
    x = 128,212.49

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1.5x scale

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.