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Finding the Fourth Proportional to 31,487,760.80, 47,231,641.20 and 31,487,760.80

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Solution

The fourth proportional to 31,487,760.80, 47,231,641.20 and 31,487,760.80 is: 47,231,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,487,760.80 : 47,231,641.20 = 31,487,760.80 : x
  2. Step 2: Convert to fraction form
    31,487,760.80/47,231,641.20 = 31,487,760.80/x
  3. Step 3: Cross multiply
    31,487,760.80x = 47,231,641.20 × 31,487,760.80
  4. Step 4: Simplify right side
    31,487,760.80x = 1,487,218,620,297,025
  5. Step 5: Solve for x
    x = 1,487,218,620,297,025/31,487,760.80
  6. Step 6: Final answer
    x = 47,231,641.20

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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.