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Finding the Fourth Proportional to 85,191.40, 127,940.70 and 82,426.60

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Solution

The fourth proportional to 85,191.40, 127,940.70 and 82,426.60 is: 123,788.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,191.40 : 127,940.70 = 82,426.60 : x
  2. Step 2: Convert to fraction form
    85,191.40/127,940.70 = 82,426.60/x
  3. Step 3: Cross multiply
    85,191.40x = 127,940.70 × 82,426.60
  4. Step 4: Simplify right side
    85,191.40x = 10,545,716,902.62
  5. Step 5: Solve for x
    x = 10,545,716,902.62/85,191.40
  6. Step 6: Final answer
    x = 123,788.52

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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.