Home / 109,728.20-164,592.30-80,203.70

Finding the Fourth Proportional to 109,728.20, 164,592.30 and 80,203.70

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Solution

The fourth proportional to 109,728.20, 164,592.30 and 80,203.70 is: 120,305.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,728.20 : 164,592.30 = 80,203.70 : x
  2. Step 2: Convert to fraction form
    109,728.20/164,592.30 = 80,203.70/x
  3. Step 3: Cross multiply
    109,728.20x = 164,592.30 × 80,203.70
  4. Step 4: Simplify right side
    109,728.20x = 13,200,911,451.51
  5. Step 5: Solve for x
    x = 13,200,911,451.51/109,728.20
  6. Step 6: Final answer
    x = 120,305.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.