Home / 80,809.40-121,286.10-47,487.80

Finding the Fourth Proportional to 80,809.40, 121,286.10 and 47,487.80

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Solution

The fourth proportional to 80,809.40, 121,286.10 and 47,487.80 is: 71,274.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,809.40 : 121,286.10 = 47,487.80 : x
  2. Step 2: Convert to fraction form
    80,809.40/121,286.10 = 47,487.80/x
  3. Step 3: Cross multiply
    80,809.40x = 121,286.10 × 47,487.80
  4. Step 4: Simplify right side
    80,809.40x = 5,759,610,059.58
  5. Step 5: Solve for x
    x = 5,759,610,059.58/80,809.40
  6. Step 6: Final answer
    x = 71,274.01

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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.