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Finding the Fourth Proportional to 79,147.91, 109,229.87 and 45,157.15

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Solution

The fourth proportional to 79,147.91, 109,229.87 and 45,157.15 is: 62,320.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,147.91 : 109,229.87 = 45,157.15 : x
  2. Step 2: Convert to fraction form
    79,147.91/109,229.87 = 45,157.15/x
  3. Step 3: Cross multiply
    79,147.91x = 109,229.87 × 45,157.15
  4. Step 4: Simplify right side
    79,147.91x = 4,932,509,125.21
  5. Step 5: Solve for x
    x = 4,932,509,125.21/79,147.91
  6. Step 6: Final answer
    x = 62,320.14

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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.