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Finding the Fourth Proportional to 78,665.68, 117,927.67 and 28,710.73

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Solution

The fourth proportional to 78,665.68, 117,927.67 and 28,710.73 is: 43,040.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,665.68 : 117,927.67 = 28,710.73 : x
  2. Step 2: Convert to fraction form
    78,665.68/117,927.67 = 28,710.73/x
  3. Step 3: Cross multiply
    78,665.68x = 117,927.67 × 28,710.73
  4. Step 4: Simplify right side
    78,665.68x = 3,385,789,371.44
  5. Step 5: Solve for x
    x = 3,385,789,371.44/78,665.68
  6. Step 6: Final answer
    x = 43,040.23

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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.