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Finding the Fourth Proportional to 99,863.70, 149,795.55 and 84,117.30

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Solution

The fourth proportional to 99,863.70, 149,795.55 and 84,117.30 is: 126,175.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,863.70 : 149,795.55 = 84,117.30 : x
  2. Step 2: Convert to fraction form
    99,863.70/149,795.55 = 84,117.30/x
  3. Step 3: Cross multiply
    99,863.70x = 149,795.55 × 84,117.30
  4. Step 4: Simplify right side
    99,863.70x = 12,600,397,218.02
  5. Step 5: Solve for x
    x = 12,600,397,218.02/99,863.70
  6. Step 6: Final answer
    x = 126,175.95

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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.