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Finding the Fourth Proportional to 40,648.80, 60,908.40 and 30,151.20

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Solution

The fourth proportional to 40,648.80, 60,908.40 and 30,151.20 is: 45,178.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,648.80 : 60,908.40 = 30,151.20 : x
  2. Step 2: Convert to fraction form
    40,648.80/60,908.40 = 30,151.20/x
  3. Step 3: Cross multiply
    40,648.80x = 60,908.40 × 30,151.20
  4. Step 4: Simplify right side
    40,648.80x = 1,836,461,350.08
  5. Step 5: Solve for x
    x = 1,836,461,350.08/40,648.80
  6. Step 6: Final answer
    x = 45,178.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.