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Finding the Fourth Proportional to 85,857.28, 128,799.74 and 41,487.30

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Solution

The fourth proportional to 85,857.28, 128,799.74 and 41,487.30 is: 62,237.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,857.28 : 128,799.74 = 41,487.30 : x
  2. Step 2: Convert to fraction form
    85,857.28/128,799.74 = 41,487.30/x
  3. Step 3: Cross multiply
    85,857.28x = 128,799.74 × 41,487.30
  4. Step 4: Simplify right side
    85,857.28x = 5,343,552,601.87
  5. Step 5: Solve for x
    x = 5,343,552,601.87/85,857.28
  6. Step 6: Final answer
    x = 62,237.62

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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.