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Finding the Fourth Proportional to 99,640.96, 137,502.49 and 54,928.96

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Solution

The fourth proportional to 99,640.96, 137,502.49 and 54,928.96 is: 75,800.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,640.96 : 137,502.49 = 54,928.96 : x
  2. Step 2: Convert to fraction form
    99,640.96/137,502.49 = 54,928.96/x
  3. Step 3: Cross multiply
    99,640.96x = 137,502.49 × 54,928.96
  4. Step 4: Simplify right side
    99,640.96x = 7,552,868,773.11
  5. Step 5: Solve for x
    x = 7,552,868,773.11/99,640.96
  6. Step 6: Final answer
    x = 75,800.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.