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Finding the Fourth Proportional to 68,349.78, 102,619.11 and 47,237.81

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Solution

The fourth proportional to 68,349.78, 102,619.11 and 47,237.81 is: 70,921.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,349.78 : 102,619.11 = 47,237.81 : x
  2. Step 2: Convert to fraction form
    68,349.78/102,619.11 = 47,237.81/x
  3. Step 3: Cross multiply
    68,349.78x = 102,619.11 × 47,237.81
  4. Step 4: Simplify right side
    68,349.78x = 4,847,501,271.26
  5. Step 5: Solve for x
    x = 4,847,501,271.26/68,349.78
  6. Step 6: Final answer
    x = 70,921.97

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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.