Home / 80,913.80-121,241.10-51,278.60

Finding the Fourth Proportional to 80,913.80, 121,241.10 and 51,278.60

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Solution

The fourth proportional to 80,913.80, 121,241.10 and 51,278.60 is: 76,835.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,913.80 : 121,241.10 = 51,278.60 : x
  2. Step 2: Convert to fraction form
    80,913.80/121,241.10 = 51,278.60/x
  3. Step 3: Cross multiply
    80,913.80x = 121,241.10 × 51,278.60
  4. Step 4: Simplify right side
    80,913.80x = 6,217,073,870.46
  5. Step 5: Solve for x
    x = 6,217,073,870.46/80,913.80
  6. Step 6: Final answer
    x = 76,835.77

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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.