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Finding the Fourth Proportional to 72,685.64, 100,309.02 and 40,854.44

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Solution

The fourth proportional to 72,685.64, 100,309.02 and 40,854.44 is: 56,380.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,685.64 : 100,309.02 = 40,854.44 : x
  2. Step 2: Convert to fraction form
    72,685.64/100,309.02 = 40,854.44/x
  3. Step 3: Cross multiply
    72,685.64x = 100,309.02 × 40,854.44
  4. Step 4: Simplify right side
    72,685.64x = 4,098,068,839.05
  5. Step 5: Solve for x
    x = 4,098,068,839.05/72,685.64
  6. Step 6: Final answer
    x = 56,380.72

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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.