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Finding the Fourth Proportional to 171,516.80, 257,560.32 and 115,715.90

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Solution

The fourth proportional to 171,516.80, 257,560.32 and 115,715.90 is: 173,766.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,516.80 : 257,560.32 = 115,715.90 : x
  2. Step 2: Convert to fraction form
    171,516.80/257,560.32 = 115,715.90/x
  3. Step 3: Cross multiply
    171,516.80x = 257,560.32 × 115,715.90
  4. Step 4: Simplify right side
    171,516.80x = 29,803,824,233.09
  5. Step 5: Solve for x
    x = 29,803,824,233.09/171,516.80
  6. Step 6: Final answer
    x = 173,766.21

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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.