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Finding the Fourth Proportional to 136,121.70, 204,182.55 and 77,072.70

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Solution

The fourth proportional to 136,121.70, 204,182.55 and 77,072.70 is: 115,609.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,121.70 : 204,182.55 = 77,072.70 : x
  2. Step 2: Convert to fraction form
    136,121.70/204,182.55 = 77,072.70/x
  3. Step 3: Cross multiply
    136,121.70x = 204,182.55 × 77,072.70
  4. Step 4: Simplify right side
    136,121.70x = 15,736,900,421.39
  5. Step 5: Solve for x
    x = 15,736,900,421.39/136,121.70
  6. Step 6: Final answer
    x = 115,609.05

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1.5x scale

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.