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Finding the Fourth Proportional to 68,878.57, 103,081.93 and 47,842.33

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Solution

The fourth proportional to 68,878.57, 103,081.93 and 47,842.33 is: 71,599.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,878.57 : 103,081.93 = 47,842.33 : x
  2. Step 2: Convert to fraction form
    68,878.57/103,081.93 = 47,842.33/x
  3. Step 3: Cross multiply
    68,878.57x = 103,081.93 × 47,842.33
  4. Step 4: Simplify right side
    68,878.57x = 4,931,679,712.10
  5. Step 5: Solve for x
    x = 4,931,679,712.10/68,878.57
  6. Step 6: Final answer
    x = 71,599.62

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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.