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Finding the Fourth Proportional to 74,428.70, 111,729.45 and 44,879.90

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Solution

The fourth proportional to 74,428.70, 111,729.45 and 44,879.90 is: 67,371.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,428.70 : 111,729.45 = 44,879.90 : x
  2. Step 2: Convert to fraction form
    74,428.70/111,729.45 = 44,879.90/x
  3. Step 3: Cross multiply
    74,428.70x = 111,729.45 × 44,879.90
  4. Step 4: Simplify right side
    74,428.70x = 5,014,406,543.06
  5. Step 5: Solve for x
    x = 5,014,406,543.06/74,428.70
  6. Step 6: Final answer
    x = 67,371.95

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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.