Home / 79,542.15-119,310.48-20,378.40

Finding the Fourth Proportional to 79,542.15, 119,310.48 and 20,378.40

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Solution

The fourth proportional to 79,542.15, 119,310.48 and 20,378.40 is: 30,566.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,542.15 : 119,310.48 = 20,378.40 : x
  2. Step 2: Convert to fraction form
    79,542.15/119,310.48 = 20,378.40/x
  3. Step 3: Cross multiply
    79,542.15x = 119,310.48 × 20,378.40
  4. Step 4: Simplify right side
    79,542.15x = 2,431,356,685.63
  5. Step 5: Solve for x
    x = 2,431,356,685.63/79,542.15
  6. Step 6: Final answer
    x = 30,566.90

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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.