Home / 81,721.76-112,780.60-49,881.52

Finding the Fourth Proportional to 81,721.76, 112,780.60 and 49,881.52

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Solution

The fourth proportional to 81,721.76, 112,780.60 and 49,881.52 is: 68,839.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,721.76 : 112,780.60 = 49,881.52 : x
  2. Step 2: Convert to fraction form
    81,721.76/112,780.60 = 49,881.52/x
  3. Step 3: Cross multiply
    81,721.76x = 112,780.60 × 49,881.52
  4. Step 4: Simplify right side
    81,721.76x = 5,625,667,754.51
  5. Step 5: Solve for x
    x = 5,625,667,754.51/81,721.76
  6. Step 6: Final answer
    x = 68,839.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.