Home / 79,115.38-109,182.23-45,129.40

Finding the Fourth Proportional to 79,115.38, 109,182.23 and 45,129.40

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Solution

The fourth proportional to 79,115.38, 109,182.23 and 45,129.40 is: 62,280.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,115.38 : 109,182.23 = 45,129.40 : x
  2. Step 2: Convert to fraction form
    79,115.38/109,182.23 = 45,129.40/x
  3. Step 3: Cross multiply
    79,115.38x = 109,182.23 × 45,129.40
  4. Step 4: Simplify right side
    79,115.38x = 4,927,328,530.56
  5. Step 5: Solve for x
    x = 4,927,328,530.56/79,115.38
  6. Step 6: Final answer
    x = 62,280.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.