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Finding the Fourth Proportional to 93,128.88, 128,517.85 and 50,687.71

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Solution

The fourth proportional to 93,128.88, 128,517.85 and 50,687.71 is: 69,949.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,128.88 : 128,517.85 = 50,687.71 : x
  2. Step 2: Convert to fraction form
    93,128.88/128,517.85 = 50,687.71/x
  3. Step 3: Cross multiply
    93,128.88x = 128,517.85 × 50,687.71
  4. Step 4: Simplify right side
    93,128.88x = 6,514,275,510.62
  5. Step 5: Solve for x
    x = 6,514,275,510.62/93,128.88
  6. Step 6: Final answer
    x = 69,949.04

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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.