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Finding the Fourth Proportional to 99,889.05, 137,845.16 and 54,565.87

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Solution

The fourth proportional to 99,889.05, 137,845.16 and 54,565.87 is: 75,299.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,889.05 : 137,845.16 = 54,565.87 : x
  2. Step 2: Convert to fraction form
    99,889.05/137,845.16 = 54,565.87/x
  3. Step 3: Cross multiply
    99,889.05x = 137,845.16 × 54,565.87
  4. Step 4: Simplify right side
    99,889.05x = 7,521,641,389.41
  5. Step 5: Solve for x
    x = 7,521,641,389.41/99,889.05
  6. Step 6: Final answer
    x = 75,299.96

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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.