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Finding the Fourth Proportional to 86,321.57, 129,601.62 and 59,604.86

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Solution

The fourth proportional to 86,321.57, 129,601.62 and 59,604.86 is: 89,489.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,321.57 : 129,601.62 = 59,604.86 : x
  2. Step 2: Convert to fraction form
    86,321.57/129,601.62 = 59,604.86/x
  3. Step 3: Cross multiply
    86,321.57x = 129,601.62 × 59,604.86
  4. Step 4: Simplify right side
    86,321.57x = 7,724,886,739.88
  5. Step 5: Solve for x
    x = 7,724,886,739.88/86,321.57
  6. Step 6: Final answer
    x = 89,489.64

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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.