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Finding the Fourth Proportional to 62,981.32, 86,907.79 and 38,778.44

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Solution

The fourth proportional to 62,981.32, 86,907.79 and 38,778.44 is: 53,510.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,981.32 : 86,907.79 = 38,778.44 : x
  2. Step 2: Convert to fraction form
    62,981.32/86,907.79 = 38,778.44/x
  3. Step 3: Cross multiply
    62,981.32x = 86,907.79 × 38,778.44
  4. Step 4: Simplify right side
    62,981.32x = 3,370,148,520.05
  5. Step 5: Solve for x
    x = 3,370,148,520.05/62,981.32
  6. Step 6: Final answer
    x = 53,510.29

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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.