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Finding the Fourth Proportional to 172,909.83, 259,387.43 and 67,715.13

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Solution

The fourth proportional to 172,909.83, 259,387.43 and 67,715.13 is: 101,581.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,909.83 : 259,387.43 = 67,715.13 : x
  2. Step 2: Convert to fraction form
    172,909.83/259,387.43 = 67,715.13/x
  3. Step 3: Cross multiply
    172,909.83x = 259,387.43 × 67,715.13
  4. Step 4: Simplify right side
    172,909.83x = 17,564,453,204.24
  5. Step 5: Solve for x
    x = 17,564,453,204.24/172,909.83
  6. Step 6: Final answer
    x = 101,581.58

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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.