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Finding the Fourth Proportional to 85,449.30, 128,162.90 and 26,283.66

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Solution

The fourth proportional to 85,449.30, 128,162.90 and 26,283.66 is: 39,422.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,449.30 : 128,162.90 = 26,283.66 : x
  2. Step 2: Convert to fraction form
    85,449.30/128,162.90 = 26,283.66/x
  3. Step 3: Cross multiply
    85,449.30x = 128,162.90 × 26,283.66
  4. Step 4: Simplify right side
    85,449.30x = 3,368,589,956.80
  5. Step 5: Solve for x
    x = 3,368,589,956.80/85,449.30
  6. Step 6: Final answer
    x = 39,422.09

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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.