Home / 81,091.30-121,572.15-34,305.70

Finding the Fourth Proportional to 81,091.30, 121,572.15 and 34,305.70

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Solution

The fourth proportional to 81,091.30, 121,572.15 and 34,305.70 is: 51,431.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,091.30 : 121,572.15 = 34,305.70 : x
  2. Step 2: Convert to fraction form
    81,091.30/121,572.15 = 34,305.70/x
  3. Step 3: Cross multiply
    81,091.30x = 121,572.15 × 34,305.70
  4. Step 4: Simplify right side
    81,091.30x = 4,170,617,706.26
  5. Step 5: Solve for x
    x = 4,170,617,706.26/81,091.30
  6. Step 6: Final answer
    x = 51,431.14

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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.