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Finding the Fourth Proportional to 72,700.88, 100,324.58 and 40,872.74

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Solution

The fourth proportional to 72,700.88, 100,324.58 and 40,872.74 is: 56,402.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,700.88 : 100,324.58 = 40,872.74 : x
  2. Step 2: Convert to fraction form
    72,700.88/100,324.58 = 40,872.74/x
  3. Step 3: Cross multiply
    72,700.88x = 100,324.58 × 40,872.74
  4. Step 4: Simplify right side
    72,700.88x = 4,100,540,473.95
  5. Step 5: Solve for x
    x = 4,100,540,473.95/72,700.88
  6. Step 6: Final answer
    x = 56,402.90

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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.