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Finding the Fourth Proportional to 79,245.27, 109,358.91 and 47,406.20

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Solution

The fourth proportional to 79,245.27, 109,358.91 and 47,406.20 is: 65,420.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,245.27 : 109,358.91 = 47,406.20 : x
  2. Step 2: Convert to fraction form
    79,245.27/109,358.91 = 47,406.20/x
  3. Step 3: Cross multiply
    79,245.27x = 109,358.91 × 47,406.20
  4. Step 4: Simplify right side
    79,245.27x = 5,184,289,812.45
  5. Step 5: Solve for x
    x = 5,184,289,812.45/79,245.27
  6. Step 6: Final answer
    x = 65,420.81

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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.