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Finding the Fourth Proportional to 79,745.60, 119,715.60 and 40,282.40

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Solution

The fourth proportional to 79,745.60, 119,715.60 and 40,282.40 is: 60,472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,745.60 : 119,715.60 = 40,282.40 : x
  2. Step 2: Convert to fraction form
    79,745.60/119,715.60 = 40,282.40/x
  3. Step 3: Cross multiply
    79,745.60x = 119,715.60 × 40,282.40
  4. Step 4: Simplify right side
    79,745.60x = 4,822,431,685.44
  5. Step 5: Solve for x
    x = 4,822,431,685.44/79,745.60
  6. Step 6: Final answer
    x = 60,472.70

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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.