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Finding the Fourth Proportional to 72,715.74, 100,346.51 and 40,449.97

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Solution

The fourth proportional to 72,715.74, 100,346.51 and 40,449.97 is: 55,820.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,715.74 : 100,346.51 = 40,449.97 : x
  2. Step 2: Convert to fraction form
    72,715.74/100,346.51 = 40,449.97/x
  3. Step 3: Cross multiply
    72,715.74x = 100,346.51 × 40,449.97
  4. Step 4: Simplify right side
    72,715.74x = 4,059,013,233.90
  5. Step 5: Solve for x
    x = 4,059,013,233.90/72,715.74
  6. Step 6: Final answer
    x = 55,820.29

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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.