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Finding the Fourth Proportional to 98,458.60, 135,966.18 and 80,573.80

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Solution

The fourth proportional to 98,458.60, 135,966.18 and 80,573.80 is: 111,268.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,458.60 : 135,966.18 = 80,573.80 : x
  2. Step 2: Convert to fraction form
    98,458.60/135,966.18 = 80,573.80/x
  3. Step 3: Cross multiply
    98,458.60x = 135,966.18 × 80,573.80
  4. Step 4: Simplify right side
    98,458.60x = 10,955,311,794.08
  5. Step 5: Solve for x
    x = 10,955,311,794.08/98,458.60
  6. Step 6: Final answer
    x = 111,268.21

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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.