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Finding the Fourth Proportional to 86,218.60, 129,327.66 and 27,054.52

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Solution

The fourth proportional to 86,218.60, 129,327.66 and 27,054.52 is: 40,581.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,218.60 : 129,327.66 = 27,054.52 : x
  2. Step 2: Convert to fraction form
    86,218.60/129,327.66 = 27,054.52/x
  3. Step 3: Cross multiply
    86,218.60x = 129,327.66 × 27,054.52
  4. Step 4: Simplify right side
    86,218.60x = 3,498,897,764.02
  5. Step 5: Solve for x
    x = 3,498,897,764.02/86,218.60
  6. Step 6: Final answer
    x = 40,581.70

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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.