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Finding the Fourth Proportional to 68,855, 95,019.90 and 39,047

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Solution

The fourth proportional to 68,855, 95,019.90 and 39,047 is: 53,884.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,855 : 95,019.90 = 39,047 : x
  2. Step 2: Convert to fraction form
    68,855/95,019.90 = 39,047/x
  3. Step 3: Cross multiply
    68,855x = 95,019.90 × 39,047
  4. Step 4: Simplify right side
    68,855x = 3,710,242,035.30
  5. Step 5: Solve for x
    x = 3,710,242,035.30/68,855
  6. Step 6: Final answer
    x = 53,884.86

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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.