Home / 80,419.84-120,818.27-75,875.50

Finding the Fourth Proportional to 80,419.84, 120,818.27 and 75,875.50

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Solution

The fourth proportional to 80,419.84, 120,818.27 and 75,875.50 is: 113,991.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,419.84 : 120,818.27 = 75,875.50 : x
  2. Step 2: Convert to fraction form
    80,419.84/120,818.27 = 75,875.50/x
  3. Step 3: Cross multiply
    80,419.84x = 120,818.27 × 75,875.50
  4. Step 4: Simplify right side
    80,419.84x = 9,167,146,645.39
  5. Step 5: Solve for x
    x = 9,167,146,645.39/80,419.84
  6. Step 6: Final answer
    x = 113,991.11

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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.