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Finding the Fourth Proportional to 72,750.28, 100,380.18 and 40,920.52

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Solution

The fourth proportional to 72,750.28, 100,380.18 and 40,920.52 is: 56,461.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,750.28 : 100,380.18 = 40,920.52 : x
  2. Step 2: Convert to fraction form
    72,750.28/100,380.18 = 40,920.52/x
  3. Step 3: Cross multiply
    72,750.28x = 100,380.18 × 40,920.52
  4. Step 4: Simplify right side
    72,750.28x = 4,107,609,163.29
  5. Step 5: Solve for x
    x = 4,107,609,163.29/72,750.28
  6. Step 6: Final answer
    x = 56,461.76

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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.