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Finding the Fourth Proportional to 57,022.80, 85,436.01 and 40,355.40

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Solution

The fourth proportional to 57,022.80, 85,436.01 and 40,355.40 is: 60,463.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,022.80 : 85,436.01 = 40,355.40 : x
  2. Step 2: Convert to fraction form
    57,022.80/85,436.01 = 40,355.40/x
  3. Step 3: Cross multiply
    57,022.80x = 85,436.01 × 40,355.40
  4. Step 4: Simplify right side
    57,022.80x = 3,447,804,357.95
  5. Step 5: Solve for x
    x = 3,447,804,357.95/57,022.80
  6. Step 6: Final answer
    x = 60,463.61

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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.