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Finding the Fourth Proportional to 79,648.12, 109,923.78 and 47,816.20

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Solution

The fourth proportional to 79,648.12, 109,923.78 and 47,816.20 is: 65,991.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,648.12 : 109,923.78 = 47,816.20 : x
  2. Step 2: Convert to fraction form
    79,648.12/109,923.78 = 47,816.20/x
  3. Step 3: Cross multiply
    79,648.12x = 109,923.78 × 47,816.20
  4. Step 4: Simplify right side
    79,648.12x = 5,256,137,449.24
  5. Step 5: Solve for x
    x = 5,256,137,449.24/79,648.12
  6. Step 6: Final answer
    x = 65,991.98

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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.