Home / 71,902.20-99,231-40,066.76

Finding the Fourth Proportional to 71,902.20, 99,231 and 40,066.76

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Solution

The fourth proportional to 71,902.20, 99,231 and 40,066.76 is: 55,295.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,902.20 : 99,231 = 40,066.76 : x
  2. Step 2: Convert to fraction form
    71,902.20/99,231 = 40,066.76/x
  3. Step 3: Cross multiply
    71,902.20x = 99,231 × 40,066.76
  4. Step 4: Simplify right side
    71,902.20x = 3,975,864,661.56
  5. Step 5: Solve for x
    x = 3,975,864,661.56/71,902.20
  6. Step 6: Final answer
    x = 55,295.45

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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.