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Finding the Fourth Proportional to 77,873.88, 107,353.98 and 55,479

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Solution

The fourth proportional to 77,873.88, 107,353.98 and 55,479 is: 76,481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,873.88 : 107,353.98 = 55,479 : x
  2. Step 2: Convert to fraction form
    77,873.88/107,353.98 = 55,479/x
  3. Step 3: Cross multiply
    77,873.88x = 107,353.98 × 55,479
  4. Step 4: Simplify right side
    77,873.88x = 5,955,891,456.42
  5. Step 5: Solve for x
    x = 5,955,891,456.42/77,873.88
  6. Step 6: Final answer
    x = 76,481.25

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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.