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Finding the Fourth Proportional to 136,310.63, 188,266.14 and 90,909.70

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Solution

The fourth proportional to 136,310.63, 188,266.14 and 90,909.70 is: 125,560.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,310.63 : 188,266.14 = 90,909.70 : x
  2. Step 2: Convert to fraction form
    136,310.63/188,266.14 = 90,909.70/x
  3. Step 3: Cross multiply
    136,310.63x = 188,266.14 × 90,909.70
  4. Step 4: Simplify right side
    136,310.63x = 17,115,217,836.89
  5. Step 5: Solve for x
    x = 17,115,217,836.89/136,310.63
  6. Step 6: Final answer
    x = 125,560.41

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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.