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Finding the Fourth Proportional to 80,881.70, 121,322.55 and 68,051.30

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Solution

The fourth proportional to 80,881.70, 121,322.55 and 68,051.30 is: 102,076.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,881.70 : 121,322.55 = 68,051.30 : x
  2. Step 2: Convert to fraction form
    80,881.70/121,322.55 = 68,051.30/x
  3. Step 3: Cross multiply
    80,881.70x = 121,322.55 × 68,051.30
  4. Step 4: Simplify right side
    80,881.70x = 8,256,157,246.82
  5. Step 5: Solve for x
    x = 8,256,157,246.82/80,881.70
  6. Step 6: Final answer
    x = 102,076.95

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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.