Home / 81,961.40-112,868.68-71,201.36

Finding the Fourth Proportional to 81,961.40, 112,868.68 and 71,201.36

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Solution

The fourth proportional to 81,961.40, 112,868.68 and 71,201.36 is: 98,051.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,961.40 : 112,868.68 = 71,201.36 : x
  2. Step 2: Convert to fraction form
    81,961.40/112,868.68 = 71,201.36/x
  3. Step 3: Cross multiply
    81,961.40x = 112,868.68 × 71,201.36
  4. Step 4: Simplify right side
    81,961.40x = 8,036,403,517.40
  5. Step 5: Solve for x
    x = 8,036,403,517.40/81,961.40
  6. Step 6: Final answer
    x = 98,051.08

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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.