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Finding the Fourth Proportional to 109,988.61, 151,705.87 and 100,943.13

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Solution

The fourth proportional to 109,988.61, 151,705.87 and 100,943.13 is: 139,229.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,988.61 : 151,705.87 = 100,943.13 : x
  2. Step 2: Convert to fraction form
    109,988.61/151,705.87 = 100,943.13/x
  3. Step 3: Cross multiply
    109,988.61x = 151,705.87 × 100,943.13
  4. Step 4: Simplify right side
    109,988.61x = 15,313,665,357.17
  5. Step 5: Solve for x
    x = 15,313,665,357.17/109,988.61
  6. Step 6: Final answer
    x = 139,229.56

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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.