Home / 85,403.25-128,151.14-35,517.78

Finding the Fourth Proportional to 85,403.25, 128,151.14 and 35,517.78

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Solution

The fourth proportional to 85,403.25, 128,151.14 and 35,517.78 is: 53,295.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.25 : 128,151.14 = 35,517.78 : x
  2. Step 2: Convert to fraction form
    85,403.25/128,151.14 = 35,517.78/x
  3. Step 3: Cross multiply
    85,403.25x = 128,151.14 × 35,517.78
  4. Step 4: Simplify right side
    85,403.25x = 4,551,643,997.27
  5. Step 5: Solve for x
    x = 4,551,643,997.27/85,403.25
  6. Step 6: Final answer
    x = 53,295.91

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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.