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Finding the Fourth Proportional to 65,872.85, 90,843.12 and 60,980.04

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Solution

The fourth proportional to 65,872.85, 90,843.12 and 60,980.04 is: 84,095.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,872.85 : 90,843.12 = 60,980.04 : x
  2. Step 2: Convert to fraction form
    65,872.85/90,843.12 = 60,980.04/x
  3. Step 3: Cross multiply
    65,872.85x = 90,843.12 × 60,980.04
  4. Step 4: Simplify right side
    65,872.85x = 5,539,617,091.32
  5. Step 5: Solve for x
    x = 5,539,617,091.32/65,872.85
  6. Step 6: Final answer
    x = 84,095.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.