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Finding the Fourth Proportional to 62,990.78, 94,025.25 and 55,517.58

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Solution

The fourth proportional to 62,990.78, 94,025.25 and 55,517.58 is: 82,870.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,990.78 : 94,025.25 = 55,517.58 : x
  2. Step 2: Convert to fraction form
    62,990.78/94,025.25 = 55,517.58/x
  3. Step 3: Cross multiply
    62,990.78x = 94,025.25 × 55,517.58
  4. Step 4: Simplify right side
    62,990.78x = 5,220,054,338.90
  5. Step 5: Solve for x
    x = 5,220,054,338.90/62,990.78
  6. Step 6: Final answer
    x = 82,870.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.