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Finding the Fourth Proportional to 82,968.53, 124,578.08 and 66,278.97

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Solution

The fourth proportional to 82,968.53, 124,578.08 and 66,278.97 is: 99,518.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,968.53 : 124,578.08 = 66,278.97 : x
  2. Step 2: Convert to fraction form
    82,968.53/124,578.08 = 66,278.97/x
  3. Step 3: Cross multiply
    82,968.53x = 124,578.08 × 66,278.97
  4. Step 4: Simplify right side
    82,968.53x = 8,256,906,495.58
  5. Step 5: Solve for x
    x = 8,256,906,495.58/82,968.53
  6. Step 6: Final answer
    x = 99,518.54

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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.