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Finding the Fourth Proportional to 243,992.56, 366,018.36 and 86,188.72

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Solution

The fourth proportional to 243,992.56, 366,018.36 and 86,188.72 is: 129,293.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,992.56 : 366,018.36 = 86,188.72 : x
  2. Step 2: Convert to fraction form
    243,992.56/366,018.36 = 86,188.72/x
  3. Step 3: Cross multiply
    243,992.56x = 366,018.36 × 86,188.72
  4. Step 4: Simplify right side
    243,992.56x = 31,546,653,944.90
  5. Step 5: Solve for x
    x = 31,546,653,944.90/243,992.56
  6. Step 6: Final answer
    x = 129,293.51

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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.