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Finding the Fourth Proportional to 68,718.54, 102,980.61 and 29,235.90

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Solution

The fourth proportional to 68,718.54, 102,980.61 and 29,235.90 is: 43,812.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,718.54 : 102,980.61 = 29,235.90 : x
  2. Step 2: Convert to fraction form
    68,718.54/102,980.61 = 29,235.90/x
  3. Step 3: Cross multiply
    68,718.54x = 102,980.61 × 29,235.90
  4. Step 4: Simplify right side
    68,718.54x = 3,010,730,815.90
  5. Step 5: Solve for x
    x = 3,010,730,815.90/68,718.54
  6. Step 6: Final answer
    x = 43,812.50

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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.