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Finding the Fourth Proportional to 136,287.80, 204,431.70 and 83,143.70

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Solution

The fourth proportional to 136,287.80, 204,431.70 and 83,143.70 is: 124,715.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,287.80 : 204,431.70 = 83,143.70 : x
  2. Step 2: Convert to fraction form
    136,287.80/204,431.70 = 83,143.70/x
  3. Step 3: Cross multiply
    136,287.80x = 204,431.70 × 83,143.70
  4. Step 4: Simplify right side
    136,287.80x = 16,997,207,935.29
  5. Step 5: Solve for x
    x = 16,997,207,935.29/136,287.80
  6. Step 6: Final answer
    x = 124,715.55

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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.