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Finding the Fourth Proportional to 76,854.80, 115,087.80 and 61,302.80

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Solution

The fourth proportional to 76,854.80, 115,087.80 and 61,302.80 is: 91,799.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,854.80 : 115,087.80 = 61,302.80 : x
  2. Step 2: Convert to fraction form
    76,854.80/115,087.80 = 61,302.80/x
  3. Step 3: Cross multiply
    76,854.80x = 115,087.80 × 61,302.80
  4. Step 4: Simplify right side
    76,854.80x = 7,055,204,385.84
  5. Step 5: Solve for x
    x = 7,055,204,385.84/76,854.80
  6. Step 6: Final answer
    x = 91,799.14

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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.