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Finding the Fourth Proportional to 80,456.80, 120,685.20 and 36,036.40

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Solution

The fourth proportional to 80,456.80, 120,685.20 and 36,036.40 is: 54,054.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,456.80 : 120,685.20 = 36,036.40 : x
  2. Step 2: Convert to fraction form
    80,456.80/120,685.20 = 36,036.40/x
  3. Step 3: Cross multiply
    80,456.80x = 120,685.20 × 36,036.40
  4. Step 4: Simplify right side
    80,456.80x = 4,349,060,141.28
  5. Step 5: Solve for x
    x = 4,349,060,141.28/80,456.80
  6. Step 6: Final answer
    x = 54,054.60

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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.