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Finding the Fourth Proportional to 80,957.10, 121,424.71 and 21,796.32

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Solution

The fourth proportional to 80,957.10, 121,424.71 and 21,796.32 is: 32,691.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,957.10 : 121,424.71 = 21,796.32 : x
  2. Step 2: Convert to fraction form
    80,957.10/121,424.71 = 21,796.32/x
  3. Step 3: Cross multiply
    80,957.10x = 121,424.71 × 21,796.32
  4. Step 4: Simplify right side
    80,957.10x = 2,646,611,835.07
  5. Step 5: Solve for x
    x = 2,646,611,835.07/80,957.10
  6. Step 6: Final answer
    x = 32,691.53

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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.