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Finding the Fourth Proportional to 68,142.52, 94,050.66 and 39,855.16

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Solution

The fourth proportional to 68,142.52, 94,050.66 and 39,855.16 is: 55,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,142.52 : 94,050.66 = 39,855.16 : x
  2. Step 2: Convert to fraction form
    68,142.52/94,050.66 = 39,855.16/x
  3. Step 3: Cross multiply
    68,142.52x = 94,050.66 × 39,855.16
  4. Step 4: Simplify right side
    68,142.52x = 3,748,404,102.41
  5. Step 5: Solve for x
    x = 3,748,404,102.41/68,142.52
  6. Step 6: Final answer
    x = 55,008.30

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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.