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Finding the Fourth Proportional to 169,978.40, 254,449.20 and 99,648.80

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Solution

The fourth proportional to 169,978.40, 254,449.20 and 99,648.80 is: 149,169.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,978.40 : 254,449.20 = 99,648.80 : x
  2. Step 2: Convert to fraction form
    169,978.40/254,449.20 = 99,648.80/x
  3. Step 3: Cross multiply
    169,978.40x = 254,449.20 × 99,648.80
  4. Step 4: Simplify right side
    169,978.40x = 25,355,557,440.96
  5. Step 5: Solve for x
    x = 25,355,557,440.96/169,978.40
  6. Step 6: Final answer
    x = 149,169.29

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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.