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Finding the Fourth Proportional to 81,243.75, 112,115.43 and 45,433.43

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Solution

The fourth proportional to 81,243.75, 112,115.43 and 45,433.43 is: 62,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,243.75 : 112,115.43 = 45,433.43 : x
  2. Step 2: Convert to fraction form
    81,243.75/112,115.43 = 45,433.43/x
  3. Step 3: Cross multiply
    81,243.75x = 112,115.43 × 45,433.43
  4. Step 4: Simplify right side
    81,243.75x = 5,093,787,980.25
  5. Step 5: Solve for x
    x = 5,093,787,980.25/81,243.75
  6. Step 6: Final answer
    x = 62,697.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.