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Finding the Fourth Proportional to 102,660.60, 153,990.90 and 83,998.20

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Solution

The fourth proportional to 102,660.60, 153,990.90 and 83,998.20 is: 125,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,660.60 : 153,990.90 = 83,998.20 : x
  2. Step 2: Convert to fraction form
    102,660.60/153,990.90 = 83,998.20/x
  3. Step 3: Cross multiply
    102,660.60x = 153,990.90 × 83,998.20
  4. Step 4: Simplify right side
    102,660.60x = 12,934,958,416.38
  5. Step 5: Solve for x
    x = 12,934,958,416.38/102,660.60
  6. Step 6: Final answer
    x = 125,997.30

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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.