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Finding the Fourth Proportional to 60,286.64, 90,400.80 and 20,829.92

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Solution

The fourth proportional to 60,286.64, 90,400.80 and 20,829.92 is: 31,234.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,286.64 : 90,400.80 = 20,829.92 : x
  2. Step 2: Convert to fraction form
    60,286.64/90,400.80 = 20,829.92/x
  3. Step 3: Cross multiply
    60,286.64x = 90,400.80 × 20,829.92
  4. Step 4: Simplify right side
    60,286.64x = 1,883,041,431.94
  5. Step 5: Solve for x
    x = 1,883,041,431.94/60,286.64
  6. Step 6: Final answer
    x = 31,234.80

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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.