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Finding the Fourth Proportional to 72,734.50, 100,374.22 and 40,903.12

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Solution

The fourth proportional to 72,734.50, 100,374.22 and 40,903.12 is: 56,446.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,734.50 : 100,374.22 = 40,903.12 : x
  2. Step 2: Convert to fraction form
    72,734.50/100,374.22 = 40,903.12/x
  3. Step 3: Cross multiply
    72,734.50x = 100,374.22 × 40,903.12
  4. Step 4: Simplify right side
    72,734.50x = 4,105,618,765.57
  5. Step 5: Solve for x
    x = 4,105,618,765.57/72,734.50
  6. Step 6: Final answer
    x = 56,446.65

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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.