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Finding the Fourth Proportional to 60,821.62, 91,241.16 and 18,705.25

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Solution

The fourth proportional to 60,821.62, 91,241.16 and 18,705.25 is: 28,060.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,821.62 : 91,241.16 = 18,705.25 : x
  2. Step 2: Convert to fraction form
    60,821.62/91,241.16 = 18,705.25/x
  3. Step 3: Cross multiply
    60,821.62x = 91,241.16 × 18,705.25
  4. Step 4: Simplify right side
    60,821.62x = 1,706,688,251.88
  5. Step 5: Solve for x
    x = 1,706,688,251.88/60,821.62
  6. Step 6: Final answer
    x = 28,060.55

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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.