Home / 81,488.16-122,251.68-31,569.48

Finding the Fourth Proportional to 81,488.16, 122,251.68 and 31,569.48

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Solution

The fourth proportional to 81,488.16, 122,251.68 and 31,569.48 is: 47,361.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,488.16 : 122,251.68 = 31,569.48 : x
  2. Step 2: Convert to fraction form
    81,488.16/122,251.68 = 31,569.48/x
  3. Step 3: Cross multiply
    81,488.16x = 122,251.68 × 31,569.48
  4. Step 4: Simplify right side
    81,488.16x = 3,859,421,966.73
  5. Step 5: Solve for x
    x = 3,859,421,966.73/81,488.16
  6. Step 6: Final answer
    x = 47,361.75

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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.