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Finding the Fourth Proportional to 98,724.60, 148,086.90 and 83,998.80

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Solution

The fourth proportional to 98,724.60, 148,086.90 and 83,998.80 is: 125,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,724.60 : 148,086.90 = 83,998.80 : x
  2. Step 2: Convert to fraction form
    98,724.60/148,086.90 = 83,998.80/x
  3. Step 3: Cross multiply
    98,724.60x = 148,086.90 × 83,998.80
  4. Step 4: Simplify right side
    98,724.60x = 12,439,121,895.72
  5. Step 5: Solve for x
    x = 12,439,121,895.72/98,724.60
  6. Step 6: Final answer
    x = 125,998.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.