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Finding the Fourth Proportional to 68,871.72, 103,347.46 and 28,887.14

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Solution

The fourth proportional to 68,871.72, 103,347.46 and 28,887.14 is: 43,347.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,871.72 : 103,347.46 = 28,887.14 : x
  2. Step 2: Convert to fraction form
    68,871.72/103,347.46 = 28,887.14/x
  3. Step 3: Cross multiply
    68,871.72x = 103,347.46 × 28,887.14
  4. Step 4: Simplify right side
    68,871.72x = 2,985,412,677.65
  5. Step 5: Solve for x
    x = 2,985,412,677.65/68,871.72
  6. Step 6: Final answer
    x = 43,347.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.