Home / 129,066.62-178,162.74-81,311.04

Finding the Fourth Proportional to 129,066.62, 178,162.74 and 81,311.04

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Solution

The fourth proportional to 129,066.62, 178,162.74 and 81,311.04 is: 112,241.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,066.62 : 178,162.74 = 81,311.04 : x
  2. Step 2: Convert to fraction form
    129,066.62/178,162.74 = 81,311.04/x
  3. Step 3: Cross multiply
    129,066.62x = 178,162.74 × 81,311.04
  4. Step 4: Simplify right side
    129,066.62x = 14,486,597,678.65
  5. Step 5: Solve for x
    x = 14,486,597,678.65/129,066.62
  6. Step 6: Final answer
    x = 112,241.25

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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.