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Finding the Fourth Proportional to 128,654.66, 177,630.18 and 80,330.24

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Solution

The fourth proportional to 128,654.66, 177,630.18 and 80,330.24 is: 110,909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,654.66 : 177,630.18 = 80,330.24 : x
  2. Step 2: Convert to fraction form
    128,654.66/177,630.18 = 80,330.24/x
  3. Step 3: Cross multiply
    128,654.66x = 177,630.18 × 80,330.24
  4. Step 4: Simplify right side
    128,654.66x = 14,269,074,990.64
  5. Step 5: Solve for x
    x = 14,269,074,990.64/128,654.66
  6. Step 6: Final answer
    x = 110,909.90

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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.