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Finding the Fourth Proportional to 100,265.66, 138,366.61 and 59,981.12

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Solution

The fourth proportional to 100,265.66, 138,366.61 and 59,981.12 is: 82,773.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,265.66 : 138,366.61 = 59,981.12 : x
  2. Step 2: Convert to fraction form
    100,265.66/138,366.61 = 59,981.12/x
  3. Step 3: Cross multiply
    100,265.66x = 138,366.61 × 59,981.12
  4. Step 4: Simplify right side
    100,265.66x = 8,299,384,238.40
  5. Step 5: Solve for x
    x = 8,299,384,238.40/100,265.66
  6. Step 6: Final answer
    x = 82,773.95

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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.