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Finding the Fourth Proportional to 79,679.28, 109,963.85 and 45,690.94

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Solution

The fourth proportional to 79,679.28, 109,963.85 and 45,690.94 is: 63,057.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,679.28 : 109,963.85 = 45,690.94 : x
  2. Step 2: Convert to fraction form
    79,679.28/109,963.85 = 45,690.94/x
  3. Step 3: Cross multiply
    79,679.28x = 109,963.85 × 45,690.94
  4. Step 4: Simplify right side
    79,679.28x = 5,024,350,962.97
  5. Step 5: Solve for x
    x = 5,024,350,962.97/79,679.28
  6. Step 6: Final answer
    x = 63,057.18

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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.