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Finding the Fourth Proportional to 80,435.84, 120,428.64 and 60,652.48

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Solution

The fourth proportional to 80,435.84, 120,428.64 and 60,652.48 is: 90,808.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,435.84 : 120,428.64 = 60,652.48 : x
  2. Step 2: Convert to fraction form
    80,435.84/120,428.64 = 60,652.48/x
  3. Step 3: Cross multiply
    80,435.84x = 120,428.64 × 60,652.48
  4. Step 4: Simplify right side
    80,435.84x = 7,304,295,679.03
  5. Step 5: Solve for x
    x = 7,304,295,679.03/80,435.84
  6. Step 6: Final answer
    x = 90,808.97

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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.