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Finding the Fourth Proportional to 81,701.78, 122,657.62 and 62,993.70

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Solution

The fourth proportional to 81,701.78, 122,657.62 and 62,993.70 is: 94,571.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,701.78 : 122,657.62 = 62,993.70 : x
  2. Step 2: Convert to fraction form
    81,701.78/122,657.62 = 62,993.70/x
  3. Step 3: Cross multiply
    81,701.78x = 122,657.62 × 62,993.70
  4. Step 4: Simplify right side
    81,701.78x = 7,726,657,316.99
  5. Step 5: Solve for x
    x = 7,726,657,316.99/81,701.78
  6. Step 6: Final answer
    x = 94,571.47

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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.