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Finding the Fourth Proportional to 68,643.86, 94,661.98 and 53,531

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Solution

The fourth proportional to 68,643.86, 94,661.98 and 53,531 is: 73,820.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,643.86 : 94,661.98 = 53,531 : x
  2. Step 2: Convert to fraction form
    68,643.86/94,661.98 = 53,531/x
  3. Step 3: Cross multiply
    68,643.86x = 94,661.98 × 53,531
  4. Step 4: Simplify right side
    68,643.86x = 5,067,350,451.38
  5. Step 5: Solve for x
    x = 5,067,350,451.38/68,643.86
  6. Step 6: Final answer
    x = 73,820.88

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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.