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Finding the Fourth Proportional to 86,855.22, 119,901.06 and 65,352.96

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Solution

The fourth proportional to 86,855.22, 119,901.06 and 65,352.96 is: 90,217.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,855.22 : 119,901.06 = 65,352.96 : x
  2. Step 2: Convert to fraction form
    86,855.22/119,901.06 = 65,352.96/x
  3. Step 3: Cross multiply
    86,855.22x = 119,901.06 × 65,352.96
  4. Step 4: Simplify right side
    86,855.22x = 7,835,889,178.14
  5. Step 5: Solve for x
    x = 7,835,889,178.14/86,855.22
  6. Step 6: Final answer
    x = 90,217.83

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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.