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Finding the Fourth Proportional to 65,272.12, 90,079.98 and 36,978.04

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Solution

The fourth proportional to 65,272.12, 90,079.98 and 36,978.04 is: 51,032.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,272.12 : 90,079.98 = 36,978.04 : x
  2. Step 2: Convert to fraction form
    65,272.12/90,079.98 = 36,978.04/x
  3. Step 3: Cross multiply
    65,272.12x = 90,079.98 × 36,978.04
  4. Step 4: Simplify right side
    65,272.12x = 3,330,981,103.64
  5. Step 5: Solve for x
    x = 3,330,981,103.64/65,272.12
  6. Step 6: Final answer
    x = 51,032.22

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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.