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Finding the Fourth Proportional to 75,115.02, 112,665.21 and 19,711.02

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Solution

The fourth proportional to 75,115.02, 112,665.21 and 19,711.02 is: 29,564.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,115.02 : 112,665.21 = 19,711.02 : x
  2. Step 2: Convert to fraction form
    75,115.02/112,665.21 = 19,711.02/x
  3. Step 3: Cross multiply
    75,115.02x = 112,665.21 × 19,711.02
  4. Step 4: Simplify right side
    75,115.02x = 2,220,746,207.61
  5. Step 5: Solve for x
    x = 2,220,746,207.61/75,115.02
  6. Step 6: Final answer
    x = 29,564.61

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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.