Home / 81,947.90-112,850.07-71,187.86

Finding the Fourth Proportional to 81,947.90, 112,850.07 and 71,187.86

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Solution

The fourth proportional to 81,947.90, 112,850.07 and 71,187.86 is: 98,032.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,947.90 : 112,850.07 = 71,187.86 : x
  2. Step 2: Convert to fraction form
    81,947.90/112,850.07 = 71,187.86/x
  3. Step 3: Cross multiply
    81,947.90x = 112,850.07 × 71,187.86
  4. Step 4: Simplify right side
    81,947.90x = 8,033,554,984.15
  5. Step 5: Solve for x
    x = 8,033,554,984.15/81,947.90
  6. Step 6: Final answer
    x = 98,032.47

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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.