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Finding the Fourth Proportional to 127,288.80, 190,933.20 and 74,144.70

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Solution

The fourth proportional to 127,288.80, 190,933.20 and 74,144.70 is: 111,217.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,288.80 : 190,933.20 = 74,144.70 : x
  2. Step 2: Convert to fraction form
    127,288.80/190,933.20 = 74,144.70/x
  3. Step 3: Cross multiply
    127,288.80x = 190,933.20 × 74,144.70
  4. Step 4: Simplify right side
    127,288.80x = 14,156,684,834.04
  5. Step 5: Solve for x
    x = 14,156,684,834.04/127,288.80
  6. Step 6: Final answer
    x = 111,217.05

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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.