Home / 109,609.20-151,223.76-71,351.28

Finding the Fourth Proportional to 109,609.20, 151,223.76 and 71,351.28

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Solution

The fourth proportional to 109,609.20, 151,223.76 and 71,351.28 is: 98,440.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,609.20 : 151,223.76 = 71,351.28 : x
  2. Step 2: Convert to fraction form
    109,609.20/151,223.76 = 71,351.28/x
  3. Step 3: Cross multiply
    109,609.20x = 151,223.76 × 71,351.28
  4. Step 4: Simplify right side
    109,609.20x = 10,790,008,842.41
  5. Step 5: Solve for x
    x = 10,790,008,842.41/109,609.20
  6. Step 6: Final answer
    x = 98,440.72

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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.