Home / 81,079.60-111,899.28-49,239.76

Finding the Fourth Proportional to 81,079.60, 111,899.28 and 49,239.76

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Solution

The fourth proportional to 81,079.60, 111,899.28 and 49,239.76 is: 67,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,079.60 : 111,899.28 = 49,239.76 : x
  2. Step 2: Convert to fraction form
    81,079.60/111,899.28 = 49,239.76/x
  3. Step 3: Cross multiply
    81,079.60x = 111,899.28 × 49,239.76
  4. Step 4: Simplify right side
    81,079.60x = 5,509,893,691.37
  5. Step 5: Solve for x
    x = 5,509,893,691.37/81,079.60
  6. Step 6: Final answer
    x = 67,956.60

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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.