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Finding the Fourth Proportional to 85,701.78, 128,635.79 and 41,359.73

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Solution

The fourth proportional to 85,701.78, 128,635.79 and 41,359.73 is: 62,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,701.78 : 128,635.79 = 41,359.73 : x
  2. Step 2: Convert to fraction form
    85,701.78/128,635.79 = 41,359.73/x
  3. Step 3: Cross multiply
    85,701.78x = 128,635.79 × 41,359.73
  4. Step 4: Simplify right side
    85,701.78x = 5,320,340,692.76
  5. Step 5: Solve for x
    x = 5,320,340,692.76/85,701.78
  6. Step 6: Final answer
    x = 62,079.70

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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.