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Finding the Fourth Proportional to 81,668.16, 122,605.92 and 69,433.92

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Solution

The fourth proportional to 81,668.16, 122,605.92 and 69,433.92 is: 104,239.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,668.16 : 122,605.92 = 69,433.92 : x
  2. Step 2: Convert to fraction form
    81,668.16/122,605.92 = 69,433.92/x
  3. Step 3: Cross multiply
    81,668.16x = 122,605.92 × 69,433.92
  4. Step 4: Simplify right side
    81,668.16x = 8,513,009,640.81
  5. Step 5: Solve for x
    x = 8,513,009,640.81/81,668.16
  6. Step 6: Final answer
    x = 104,239.03

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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.