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Finding the Fourth Proportional to 85,846.32, 128,728.62 and 26,682.84

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Solution

The fourth proportional to 85,846.32, 128,728.62 and 26,682.84 is: 40,011.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,846.32 : 128,728.62 = 26,682.84 : x
  2. Step 2: Convert to fraction form
    85,846.32/128,728.62 = 26,682.84/x
  3. Step 3: Cross multiply
    85,846.32x = 128,728.62 × 26,682.84
  4. Step 4: Simplify right side
    85,846.32x = 3,434,845,170.88
  5. Step 5: Solve for x
    x = 3,434,845,170.88/85,846.32
  6. Step 6: Final answer
    x = 40,011.56

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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.