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Finding the Fourth Proportional to 68,449.60, 102,650.10 and 47,389.60

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Solution

The fourth proportional to 68,449.60, 102,650.10 and 47,389.60 is: 71,067.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,449.60 : 102,650.10 = 47,389.60 : x
  2. Step 2: Convert to fraction form
    68,449.60/102,650.10 = 47,389.60/x
  3. Step 3: Cross multiply
    68,449.60x = 102,650.10 × 47,389.60
  4. Step 4: Simplify right side
    68,449.60x = 4,864,547,178.96
  5. Step 5: Solve for x
    x = 4,864,547,178.96/68,449.60
  6. Step 6: Final answer
    x = 71,067.58

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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.