Home / 129,297.40-178,454.99-80,921.83

Finding the Fourth Proportional to 129,297.40, 178,454.99 and 80,921.83

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Solution

The fourth proportional to 129,297.40, 178,454.99 and 80,921.83 is: 111,687.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,297.40 : 178,454.99 = 80,921.83 : x
  2. Step 2: Convert to fraction form
    129,297.40/178,454.99 = 80,921.83/x
  3. Step 3: Cross multiply
    129,297.40x = 178,454.99 × 80,921.83
  4. Step 4: Simplify right side
    129,297.40x = 14,440,903,066.55
  5. Step 5: Solve for x
    x = 14,440,903,066.55/129,297.40
  6. Step 6: Final answer
    x = 111,687.50

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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.