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Finding the Fourth Proportional to 80,732.80, 121,142.40 and 36,366.40

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Solution

The fourth proportional to 80,732.80, 121,142.40 and 36,366.40 is: 54,569.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,732.80 : 121,142.40 = 36,366.40 : x
  2. Step 2: Convert to fraction form
    80,732.80/121,142.40 = 36,366.40/x
  3. Step 3: Cross multiply
    80,732.80x = 121,142.40 × 36,366.40
  4. Step 4: Simplify right side
    80,732.80x = 4,405,512,975.36
  5. Step 5: Solve for x
    x = 4,405,512,975.36/80,732.80
  6. Step 6: Final answer
    x = 54,569.06

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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.