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Finding the Fourth Proportional to 72,740.48, 100,380.84 and 40,474.80

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Solution

The fourth proportional to 72,740.48, 100,380.84 and 40,474.80 is: 55,854.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,740.48 : 100,380.84 = 40,474.80 : x
  2. Step 2: Convert to fraction form
    72,740.48/100,380.84 = 40,474.80/x
  3. Step 3: Cross multiply
    72,740.48x = 100,380.84 × 40,474.80
  4. Step 4: Simplify right side
    72,740.48x = 4,062,894,422.83
  5. Step 5: Solve for x
    x = 4,062,894,422.83/72,740.48
  6. Step 6: Final answer
    x = 55,854.66

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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.