Home / 80,814.40-121,221.64-21,648.56

Finding the Fourth Proportional to 80,814.40, 121,221.64 and 21,648.56

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Solution

The fourth proportional to 80,814.40, 121,221.64 and 21,648.56 is: 32,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,814.40 : 121,221.64 = 21,648.56 : x
  2. Step 2: Convert to fraction form
    80,814.40/121,221.64 = 21,648.56/x
  3. Step 3: Cross multiply
    80,814.40x = 121,221.64 × 21,648.56
  4. Step 4: Simplify right side
    80,814.40x = 2,624,273,946.84
  5. Step 5: Solve for x
    x = 2,624,273,946.84/80,814.40
  6. Step 6: Final answer
    x = 32,472.85

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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.