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Finding the Fourth Proportional to 118,776.56, 177,916.92 and 71,240.90

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Solution

The fourth proportional to 118,776.56, 177,916.92 and 71,240.90 is: 106,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,776.56 : 177,916.92 = 71,240.90 : x
  2. Step 2: Convert to fraction form
    118,776.56/177,916.92 = 71,240.90/x
  3. Step 3: Cross multiply
    118,776.56x = 177,916.92 × 71,240.90
  4. Step 4: Simplify right side
    118,776.56x = 12,674,960,616.44
  5. Step 5: Solve for x
    x = 12,674,960,616.44/118,776.56
  6. Step 6: Final answer
    x = 106,712.65

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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.