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Finding the Fourth Proportional to 136,540.17, 188,506.17 and 121,390.91

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Solution

The fourth proportional to 136,540.17, 188,506.17 and 121,390.91 is: 167,591.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,540.17 : 188,506.17 = 121,390.91 : x
  2. Step 2: Convert to fraction form
    136,540.17/188,506.17 = 121,390.91/x
  3. Step 3: Cross multiply
    136,540.17x = 188,506.17 × 121,390.91
  4. Step 4: Simplify right side
    136,540.17x = 22,882,935,281.28
  5. Step 5: Solve for x
    x = 22,882,935,281.28/136,540.17
  6. Step 6: Final answer
    x = 167,591.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.