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Finding the Fourth Proportional to 79,641.40, 119,378.22 and 40,115.44

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Solution

The fourth proportional to 79,641.40, 119,378.22 and 40,115.44 is: 60,130.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,641.40 : 119,378.22 = 40,115.44 : x
  2. Step 2: Convert to fraction form
    79,641.40/119,378.22 = 40,115.44/x
  3. Step 3: Cross multiply
    79,641.40x = 119,378.22 × 40,115.44
  4. Step 4: Simplify right side
    79,641.40x = 4,788,909,821.72
  5. Step 5: Solve for x
    x = 4,788,909,821.72/79,641.40
  6. Step 6: Final answer
    x = 60,130.91

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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.