Home / 81,537.80-122,306.70-26,139.40

Finding the Fourth Proportional to 81,537.80, 122,306.70 and 26,139.40

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Solution

The fourth proportional to 81,537.80, 122,306.70 and 26,139.40 is: 39,209.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,537.80 : 122,306.70 = 26,139.40 : x
  2. Step 2: Convert to fraction form
    81,537.80/122,306.70 = 26,139.40/x
  3. Step 3: Cross multiply
    81,537.80x = 122,306.70 × 26,139.40
  4. Step 4: Simplify right side
    81,537.80x = 3,197,023,753.98
  5. Step 5: Solve for x
    x = 3,197,023,753.98/81,537.80
  6. Step 6: Final answer
    x = 39,209.10

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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.