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Finding the Fourth Proportional to 68,709.76, 103,061.94 and 28,718.41

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Solution

The fourth proportional to 68,709.76, 103,061.94 and 28,718.41 is: 43,076.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,709.76 : 103,061.94 = 28,718.41 : x
  2. Step 2: Convert to fraction form
    68,709.76/103,061.94 = 28,718.41/x
  3. Step 3: Cross multiply
    68,709.76x = 103,061.94 × 28,718.41
  4. Step 4: Simplify right side
    68,709.76x = 2,959,775,455.12
  5. Step 5: Solve for x
    x = 2,959,775,455.12/68,709.76
  6. Step 6: Final answer
    x = 43,076.49

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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.