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Finding the Fourth Proportional to 74,218.20, 111,318.41 and 20,914.17

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Solution

The fourth proportional to 74,218.20, 111,318.41 and 20,914.17 is: 31,368.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,218.20 : 111,318.41 = 20,914.17 : x
  2. Step 2: Convert to fraction form
    74,218.20/111,318.41 = 20,914.17/x
  3. Step 3: Cross multiply
    74,218.20x = 111,318.41 × 20,914.17
  4. Step 4: Simplify right side
    74,218.20x = 2,328,132,046.30
  5. Step 5: Solve for x
    x = 2,328,132,046.30/74,218.20
  6. Step 6: Final answer
    x = 31,368.75

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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.