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Finding the Fourth Proportional to 86,728.86, 119,641.99 and 58,049.73

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Solution

The fourth proportional to 86,728.86, 119,641.99 and 58,049.73 is: 80,079.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,728.86 : 119,641.99 = 58,049.73 : x
  2. Step 2: Convert to fraction form
    86,728.86/119,641.99 = 58,049.73/x
  3. Step 3: Cross multiply
    86,728.86x = 119,641.99 × 58,049.73
  4. Step 4: Simplify right side
    86,728.86x = 6,945,185,216.16
  5. Step 5: Solve for x
    x = 6,945,185,216.16/86,728.86
  6. Step 6: Final answer
    x = 80,079.29

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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.