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Finding the Fourth Proportional to 136,689.80, 205,034.70 and 73,704.20

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Solution

The fourth proportional to 136,689.80, 205,034.70 and 73,704.20 is: 110,556.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,689.80 : 205,034.70 = 73,704.20 : x
  2. Step 2: Convert to fraction form
    136,689.80/205,034.70 = 73,704.20/x
  3. Step 3: Cross multiply
    136,689.80x = 205,034.70 × 73,704.20
  4. Step 4: Simplify right side
    136,689.80x = 15,111,918,535.74
  5. Step 5: Solve for x
    x = 15,111,918,535.74/136,689.80
  6. Step 6: Final answer
    x = 110,556.30

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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.