Home / 129,067.62-178,164.12-81,312.04

Finding the Fourth Proportional to 129,067.62, 178,164.12 and 81,312.04

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Solution

The fourth proportional to 129,067.62, 178,164.12 and 81,312.04 is: 112,242.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,067.62 : 178,164.12 = 81,312.04 : x
  2. Step 2: Convert to fraction form
    129,067.62/178,164.12 = 81,312.04/x
  3. Step 3: Cross multiply
    129,067.62x = 178,164.12 × 81,312.04
  4. Step 4: Simplify right side
    129,067.62x = 14,486,888,052.00
  5. Step 5: Solve for x
    x = 14,486,888,052.00/129,067.62
  6. Step 6: Final answer
    x = 112,242.62

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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.