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Finding the Fourth Proportional to 169,657.20, 254,680.20 and 90,730.80

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Solution

The fourth proportional to 169,657.20, 254,680.20 and 90,730.80 is: 136,200.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,657.20 : 254,680.20 = 90,730.80 : x
  2. Step 2: Convert to fraction form
    169,657.20/254,680.20 = 90,730.80/x
  3. Step 3: Cross multiply
    169,657.20x = 254,680.20 × 90,730.80
  4. Step 4: Simplify right side
    169,657.20x = 23,107,338,290.16
  5. Step 5: Solve for x
    x = 23,107,338,290.16/169,657.20
  6. Step 6: Final answer
    x = 136,200.16

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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.