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Finding the Fourth Proportional to 85,717.70, 128,610.36 and 26,557.97

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Solution

The fourth proportional to 85,717.70, 128,610.36 and 26,557.97 is: 39,847.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,717.70 : 128,610.36 = 26,557.97 : x
  2. Step 2: Convert to fraction form
    85,717.70/128,610.36 = 26,557.97/x
  3. Step 3: Cross multiply
    85,717.70x = 128,610.36 × 26,557.97
  4. Step 4: Simplify right side
    85,717.70x = 3,415,630,082.57
  5. Step 5: Solve for x
    x = 3,415,630,082.57/85,717.70
  6. Step 6: Final answer
    x = 39,847.43

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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.