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Finding the Fourth Proportional to 85,782.30, 128,685.87 and 26,622.75

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Solution

The fourth proportional to 85,782.30, 128,685.87 and 26,622.75 is: 39,937.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,782.30 : 128,685.87 = 26,622.75 : x
  2. Step 2: Convert to fraction form
    85,782.30/128,685.87 = 26,622.75/x
  3. Step 3: Cross multiply
    85,782.30x = 128,685.87 × 26,622.75
  4. Step 4: Simplify right side
    85,782.30x = 3,425,971,745.54
  5. Step 5: Solve for x
    x = 3,425,971,745.54/85,782.30
  6. Step 6: Final answer
    x = 39,937.98

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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.