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Finding the Fourth Proportional to 68,129.91, 93,921.84 and 47,924.09

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Solution

The fourth proportional to 68,129.91, 93,921.84 and 47,924.09 is: 66,066.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,129.91 : 93,921.84 = 47,924.09 : x
  2. Step 2: Convert to fraction form
    68,129.91/93,921.84 = 47,924.09/x
  3. Step 3: Cross multiply
    68,129.91x = 93,921.84 × 47,924.09
  4. Step 4: Simplify right side
    68,129.91x = 4,501,118,243.52
  5. Step 5: Solve for x
    x = 4,501,118,243.52/68,129.91
  6. Step 6: Final answer
    x = 66,066.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.