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Finding the Fourth Proportional to 105,125.92, 145,127.28 and 81,198.88

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Solution

The fourth proportional to 105,125.92, 145,127.28 and 81,198.88 is: 112,095.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,125.92 : 145,127.28 = 81,198.88 : x
  2. Step 2: Convert to fraction form
    105,125.92/145,127.28 = 81,198.88/x
  3. Step 3: Cross multiply
    105,125.92x = 145,127.28 × 81,198.88
  4. Step 4: Simplify right side
    105,125.92x = 11,784,172,593.45
  5. Step 5: Solve for x
    x = 11,784,172,593.45/105,125.92
  6. Step 6: Final answer
    x = 112,095.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.