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Finding the Fourth Proportional to 100,799.74, 138,803.65 and 98,562.18

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Solution

The fourth proportional to 100,799.74, 138,803.65 and 98,562.18 is: 135,722.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,799.74 : 138,803.65 = 98,562.18 : x
  2. Step 2: Convert to fraction form
    100,799.74/138,803.65 = 98,562.18/x
  3. Step 3: Cross multiply
    100,799.74x = 138,803.65 × 98,562.18
  4. Step 4: Simplify right side
    100,799.74x = 13,680,790,335.96
  5. Step 5: Solve for x
    x = 13,680,790,335.96/100,799.74
  6. Step 6: Final answer
    x = 135,722.48

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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.