Home / 79,131.60-109,366.20-63,385.20

Finding the Fourth Proportional to 79,131.60, 109,366.20 and 63,385.20

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Solution

The fourth proportional to 79,131.60, 109,366.20 and 63,385.20 is: 87,603.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,131.60 : 109,366.20 = 63,385.20 : x
  2. Step 2: Convert to fraction form
    79,131.60/109,366.20 = 63,385.20/x
  3. Step 3: Cross multiply
    79,131.60x = 109,366.20 × 63,385.20
  4. Step 4: Simplify right side
    79,131.60x = 6,932,198,460.24
  5. Step 5: Solve for x
    x = 6,932,198,460.24/79,131.60
  6. Step 6: Final answer
    x = 87,603.42

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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.