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Finding the Fourth Proportional to 79,209.53, 109,309.14 and 47,385.92

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Solution

The fourth proportional to 79,209.53, 109,309.14 and 47,385.92 is: 65,392.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,209.53 : 109,309.14 = 47,385.92 : x
  2. Step 2: Convert to fraction form
    79,209.53/109,309.14 = 47,385.92/x
  3. Step 3: Cross multiply
    79,209.53x = 109,309.14 × 47,385.92
  4. Step 4: Simplify right side
    79,209.53x = 5,179,714,163.31
  5. Step 5: Solve for x
    x = 5,179,714,163.31/79,209.53
  6. Step 6: Final answer
    x = 65,392.56

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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.