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Finding the Fourth Proportional to 169,920.78, 254,531.16 and 99,630.60

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Solution

The fourth proportional to 169,920.78, 254,531.16 and 99,630.60 is: 149,240.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,920.78 : 254,531.16 = 99,630.60 : x
  2. Step 2: Convert to fraction form
    169,920.78/254,531.16 = 99,630.60/x
  3. Step 3: Cross multiply
    169,920.78x = 254,531.16 × 99,630.60
  4. Step 4: Simplify right side
    169,920.78x = 25,359,092,189.50
  5. Step 5: Solve for x
    x = 25,359,092,189.50/169,920.78
  6. Step 6: Final answer
    x = 149,240.68

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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.