Home / 72,565.28-100,140.48-40,734.56

Finding the Fourth Proportional to 72,565.28, 100,140.48 and 40,734.56

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Solution

The fourth proportional to 72,565.28, 100,140.48 and 40,734.56 is: 56,213.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,565.28 : 100,140.48 = 40,734.56 : x
  2. Step 2: Convert to fraction form
    72,565.28/100,140.48 = 40,734.56/x
  3. Step 3: Cross multiply
    72,565.28x = 100,140.48 × 40,734.56
  4. Step 4: Simplify right side
    72,565.28x = 4,079,178,390.99
  5. Step 5: Solve for x
    x = 4,079,178,390.99/72,565.28
  6. Step 6: Final answer
    x = 56,213.91

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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.