Home / 80,729.40-121,101.72-21,568.60

Finding the Fourth Proportional to 80,729.40, 121,101.72 and 21,568.60

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Solution

The fourth proportional to 80,729.40, 121,101.72 and 21,568.60 is: 32,354.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,729.40 : 121,101.72 = 21,568.60 : x
  2. Step 2: Convert to fraction form
    80,729.40/121,101.72 = 21,568.60/x
  3. Step 3: Cross multiply
    80,729.40x = 121,101.72 × 21,568.60
  4. Step 4: Simplify right side
    80,729.40x = 2,611,994,557.99
  5. Step 5: Solve for x
    x = 2,611,994,557.99/80,729.40
  6. Step 6: Final answer
    x = 32,354.94

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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.