Home / 81,191.52-121,614.24-39,009.60

Finding the Fourth Proportional to 81,191.52, 121,614.24 and 39,009.60

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Solution

The fourth proportional to 81,191.52, 121,614.24 and 39,009.60 is: 58,431.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,191.52 : 121,614.24 = 39,009.60 : x
  2. Step 2: Convert to fraction form
    81,191.52/121,614.24 = 39,009.60/x
  3. Step 3: Cross multiply
    81,191.52x = 121,614.24 × 39,009.60
  4. Step 4: Simplify right side
    81,191.52x = 4,744,122,856.70
  5. Step 5: Solve for x
    x = 4,744,122,856.70/81,191.52
  6. Step 6: Final answer
    x = 58,431.26

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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.