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Finding the Fourth Proportional to 128,127.68, 192,091.92 and 83,053.88

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Solution

The fourth proportional to 128,127.68, 192,091.92 and 83,053.88 is: 124,516.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,127.68 : 192,091.92 = 83,053.88 : x
  2. Step 2: Convert to fraction form
    128,127.68/192,091.92 = 83,053.88/x
  3. Step 3: Cross multiply
    128,127.68x = 192,091.92 × 83,053.88
  4. Step 4: Simplify right side
    128,127.68x = 15,953,979,272.65
  5. Step 5: Solve for x
    x = 15,953,979,272.65/128,127.68
  6. Step 6: Final answer
    x = 124,516.26

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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.