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Finding the Fourth Proportional to 185,964.48, 279,015.84 and 86,172.48

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Solution

The fourth proportional to 185,964.48, 279,015.84 and 86,172.48 is: 129,290.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,964.48 : 279,015.84 = 86,172.48 : x
  2. Step 2: Convert to fraction form
    185,964.48/279,015.84 = 86,172.48/x
  3. Step 3: Cross multiply
    185,964.48x = 279,015.84 × 86,172.48
  4. Step 4: Simplify right side
    185,964.48x = 24,043,486,892.08
  5. Step 5: Solve for x
    x = 24,043,486,892.08/185,964.48
  6. Step 6: Final answer
    x = 129,290.75

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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.