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Finding the Fourth Proportional to 243,991.56, 366,016.86 and 86,187.72

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Solution

The fourth proportional to 243,991.56, 366,016.86 and 86,187.72 is: 129,292.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,991.56 : 366,016.86 = 86,187.72 : x
  2. Step 2: Convert to fraction form
    243,991.56/366,016.86 = 86,187.72/x
  3. Step 3: Cross multiply
    243,991.56x = 366,016.86 × 86,187.72
  4. Step 4: Simplify right side
    243,991.56x = 31,546,158,644.96
  5. Step 5: Solve for x
    x = 31,546,158,644.96/243,991.56
  6. Step 6: Final answer
    x = 129,292.01

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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.