Home / 95,420.57-131,572.80-78,139.04

Finding the Fourth Proportional to 95,420.57, 131,572.80 and 78,139.04

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Solution

The fourth proportional to 95,420.57, 131,572.80 and 78,139.04 is: 107,743.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,420.57 : 131,572.80 = 78,139.04 : x
  2. Step 2: Convert to fraction form
    95,420.57/131,572.80 = 78,139.04/x
  3. Step 3: Cross multiply
    95,420.57x = 131,572.80 × 78,139.04
  4. Step 4: Simplify right side
    95,420.57x = 10,280,971,624.25
  5. Step 5: Solve for x
    x = 10,280,971,624.25/95,420.57
  6. Step 6: Final answer
    x = 107,743.77

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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.