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Finding the Fourth Proportional to 254,170.77, 380,990.13 and 85,632.85

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Solution

The fourth proportional to 254,170.77, 380,990.13 and 85,632.85 is: 128,359.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,170.77 : 380,990.13 = 85,632.85 : x
  2. Step 2: Convert to fraction form
    254,170.77/380,990.13 = 85,632.85/x
  3. Step 3: Cross multiply
    254,170.77x = 380,990.13 × 85,632.85
  4. Step 4: Simplify right side
    254,170.77x = 32,625,270,653.77
  5. Step 5: Solve for x
    x = 32,625,270,653.77/254,170.77
  6. Step 6: Final answer
    x = 128,359.65

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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.