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Finding the Fourth Proportional to 68,856, 95,021.28 and 39,048

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Solution

The fourth proportional to 68,856, 95,021.28 and 39,048 is: 53,886.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,856 : 95,021.28 = 39,048 : x
  2. Step 2: Convert to fraction form
    68,856/95,021.28 = 39,048/x
  3. Step 3: Cross multiply
    68,856x = 95,021.28 × 39,048
  4. Step 4: Simplify right side
    68,856x = 3,710,390,941.44
  5. Step 5: Solve for x
    x = 3,710,390,941.44/68,856
  6. Step 6: Final answer
    x = 53,886.24

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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.