Home / 81,569.40-122,398.68-31,651.46

Finding the Fourth Proportional to 81,569.40, 122,398.68 and 31,651.46

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Solution

The fourth proportional to 81,569.40, 122,398.68 and 31,651.46 is: 47,494.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,569.40 : 122,398.68 = 31,651.46 : x
  2. Step 2: Convert to fraction form
    81,569.40/122,398.68 = 31,651.46/x
  3. Step 3: Cross multiply
    81,569.40x = 122,398.68 × 31,651.46
  4. Step 4: Simplify right side
    81,569.40x = 3,874,096,312.08
  5. Step 5: Solve for x
    x = 3,874,096,312.08/81,569.40
  6. Step 6: Final answer
    x = 47,494.48

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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.