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Finding the Fourth Proportional to 84,087.54, 115,920.22 and 66,151.40

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Solution

The fourth proportional to 84,087.54, 115,920.22 and 66,151.40 is: 91,194.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,087.54 : 115,920.22 = 66,151.40 : x
  2. Step 2: Convert to fraction form
    84,087.54/115,920.22 = 66,151.40/x
  3. Step 3: Cross multiply
    84,087.54x = 115,920.22 × 66,151.40
  4. Step 4: Simplify right side
    84,087.54x = 7,668,284,841.31
  5. Step 5: Solve for x
    x = 7,668,284,841.31/84,087.54
  6. Step 6: Final answer
    x = 91,194.07

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