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Finding the Fourth Proportional to 81,615.60, 122,277.60 and 69,951.60

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Solution

The fourth proportional to 81,615.60, 122,277.60 and 69,951.60 is: 104,802.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,615.60 : 122,277.60 = 69,951.60 : x
  2. Step 2: Convert to fraction form
    81,615.60/122,277.60 = 69,951.60/x
  3. Step 3: Cross multiply
    81,615.60x = 122,277.60 × 69,951.60
  4. Step 4: Simplify right side
    81,615.60x = 8,553,513,764.16
  5. Step 5: Solve for x
    x = 8,553,513,764.16/81,615.60
  6. Step 6: Final answer
    x = 104,802.44

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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.