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Finding the Fourth Proportional to 81,085.68, 111,878.28 and 49,252.68

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Solution

The fourth proportional to 81,085.68, 111,878.28 and 49,252.68 is: 67,956.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,085.68 : 111,878.28 = 49,252.68 : x
  2. Step 2: Convert to fraction form
    81,085.68/111,878.28 = 49,252.68/x
  3. Step 3: Cross multiply
    81,085.68x = 111,878.28 × 49,252.68
  4. Step 4: Simplify right side
    81,085.68x = 5,510,305,123.79
  5. Step 5: Solve for x
    x = 5,510,305,123.79/81,085.68
  6. Step 6: Final answer
    x = 67,956.58

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1.5x scale

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.