Home / 72,672.15-100,287.21-40,406.61

Finding the Fourth Proportional to 72,672.15, 100,287.21 and 40,406.61

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Solution

The fourth proportional to 72,672.15, 100,287.21 and 40,406.61 is: 55,760.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,672.15 : 100,287.21 = 40,406.61 : x
  2. Step 2: Convert to fraction form
    72,672.15/100,287.21 = 40,406.61/x
  3. Step 3: Cross multiply
    72,672.15x = 100,287.21 × 40,406.61
  4. Step 4: Simplify right side
    72,672.15x = 4,052,266,182.46
  5. Step 5: Solve for x
    x = 4,052,266,182.46/72,672.15
  6. Step 6: Final answer
    x = 55,760.92

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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.