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Finding the Fourth Proportional to 170,856.80, 255,680.40 and 148,911.20

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Solution

The fourth proportional to 170,856.80, 255,680.40 and 148,911.20 is: 222,839.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,856.80 : 255,680.40 = 148,911.20 : x
  2. Step 2: Convert to fraction form
    170,856.80/255,680.40 = 148,911.20/x
  3. Step 3: Cross multiply
    170,856.80x = 255,680.40 × 148,911.20
  4. Step 4: Simplify right side
    170,856.80x = 38,073,675,180.48
  5. Step 5: Solve for x
    x = 38,073,675,180.48/170,856.80
  6. Step 6: Final answer
    x = 222,839.68

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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.