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Finding the Fourth Proportional to 68,778.63, 103,015.53 and 52,866.50

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Solution

The fourth proportional to 68,778.63, 103,015.53 and 52,866.50 is: 79,182.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,778.63 : 103,015.53 = 52,866.50 : x
  2. Step 2: Convert to fraction form
    68,778.63/103,015.53 = 52,866.50/x
  3. Step 3: Cross multiply
    68,778.63x = 103,015.53 × 52,866.50
  4. Step 4: Simplify right side
    68,778.63x = 5,446,070,001.67
  5. Step 5: Solve for x
    x = 5,446,070,001.67/68,778.63
  6. Step 6: Final answer
    x = 79,182.59

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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.