Home / 90,016.92-135,030.24-78,071.04

Finding the Fourth Proportional to 90,016.92, 135,030.24 and 78,071.04

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Solution

The fourth proportional to 90,016.92, 135,030.24 and 78,071.04 is: 117,110.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,016.92 : 135,030.24 = 78,071.04 : x
  2. Step 2: Convert to fraction form
    90,016.92/135,030.24 = 78,071.04/x
  3. Step 3: Cross multiply
    90,016.92x = 135,030.24 × 78,071.04
  4. Step 4: Simplify right side
    90,016.92x = 10,541,951,268.25
  5. Step 5: Solve for x
    x = 10,541,951,268.25/90,016.92
  6. Step 6: Final answer
    x = 117,110.78

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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.