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Finding the Fourth Proportional to 112,404.28, 168,689.42 and 53,239.92

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Solution

The fourth proportional to 112,404.28, 168,689.42 and 53,239.92 is: 79,899.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,404.28 : 168,689.42 = 53,239.92 : x
  2. Step 2: Convert to fraction form
    112,404.28/168,689.42 = 53,239.92/x
  3. Step 3: Cross multiply
    112,404.28x = 168,689.42 × 53,239.92
  4. Step 4: Simplify right side
    112,404.28x = 8,981,011,225.65
  5. Step 5: Solve for x
    x = 8,981,011,225.65/112,404.28
  6. Step 6: Final answer
    x = 79,899.19

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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.