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Finding the Fourth Proportional to 136,339.65, 204,538.80 and 67,988.45

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Solution

The fourth proportional to 136,339.65, 204,538.80 and 67,988.45 is: 101,997.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,339.65 : 204,538.80 = 67,988.45 : x
  2. Step 2: Convert to fraction form
    136,339.65/204,538.80 = 67,988.45/x
  3. Step 3: Cross multiply
    136,339.65x = 204,538.80 × 67,988.45
  4. Step 4: Simplify right side
    136,339.65x = 13,906,275,466.23
  5. Step 5: Solve for x
    x = 13,906,275,466.23/136,339.65
  6. Step 6: Final answer
    x = 101,997.29

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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.