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Finding the Fourth Proportional to 40,310.52, 60,472.04 and 20,578.40

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Solution

The fourth proportional to 40,310.52, 60,472.04 and 20,578.40 is: 30,870.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,310.52 : 60,472.04 = 20,578.40 : x
  2. Step 2: Convert to fraction form
    40,310.52/60,472.04 = 20,578.40/x
  3. Step 3: Cross multiply
    40,310.52x = 60,472.04 × 20,578.40
  4. Step 4: Simplify right side
    40,310.52x = 1,244,417,827.94
  5. Step 5: Solve for x
    x = 1,244,417,827.94/40,310.52
  6. Step 6: Final answer
    x = 30,870.80

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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.