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Finding the Fourth Proportional to 98,909.56, 136,420.78 and 68,694.92

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Solution

The fourth proportional to 98,909.56, 136,420.78 and 68,694.92 is: 94,747.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,909.56 : 136,420.78 = 68,694.92 : x
  2. Step 2: Convert to fraction form
    98,909.56/136,420.78 = 68,694.92/x
  3. Step 3: Cross multiply
    98,909.56x = 136,420.78 × 68,694.92
  4. Step 4: Simplify right side
    98,909.56x = 9,371,414,568.44
  5. Step 5: Solve for x
    x = 9,371,414,568.44/98,909.56
  6. Step 6: Final answer
    x = 94,747.31

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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.