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Finding the Fourth Proportional to 115,125, 172,805.28 and 95,070.61

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Solution

The fourth proportional to 115,125, 172,805.28 and 95,070.61 is: 142,703.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,125 : 172,805.28 = 95,070.61 : x
  2. Step 2: Convert to fraction form
    115,125/172,805.28 = 95,070.61/x
  3. Step 3: Cross multiply
    115,125x = 172,805.28 × 95,070.61
  4. Step 4: Simplify right side
    115,125x = 16,428,703,380.82
  5. Step 5: Solve for x
    x = 16,428,703,380.82/115,125
  6. Step 6: Final answer
    x = 142,703.18

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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.