Home / 78,499.11-117,664.79-57,100.53

Finding the Fourth Proportional to 78,499.11, 117,664.79 and 57,100.53

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Solution

The fourth proportional to 78,499.11, 117,664.79 and 57,100.53 is: 85,589.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,499.11 : 117,664.79 = 57,100.53 : x
  2. Step 2: Convert to fraction form
    78,499.11/117,664.79 = 57,100.53/x
  3. Step 3: Cross multiply
    78,499.11x = 117,664.79 × 57,100.53
  4. Step 4: Simplify right side
    78,499.11x = 6,718,721,585.84
  5. Step 5: Solve for x
    x = 6,718,721,585.84/78,499.11
  6. Step 6: Final answer
    x = 85,589.78

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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.