Home / 72,418,857.20-108,647,531.40-31,460,721.20

Finding the Fourth Proportional to 72,418,857.20, 108,647,531.40 and 31,460,721.20

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Solution

The fourth proportional to 72,418,857.20, 108,647,531.40 and 31,460,721.20 is: 47,199,442.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,418,857.20 : 108,647,531.40 = 31,460,721.20 : x
  2. Step 2: Convert to fraction form
    72,418,857.20/108,647,531.40 = 31,460,721.20/x
  3. Step 3: Cross multiply
    72,418,857.20x = 108,647,531.40 × 31,460,721.20
  4. Step 4: Simplify right side
    72,418,857.20x = 3,418,129,694,443,646
  5. Step 5: Solve for x
    x = 3,418,129,694,443,646/72,418,857.20
  6. Step 6: Final answer
    x = 47,199,442.61

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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.