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Finding the Fourth Proportional to 73,979.72, 102,092.10 and 40,445.72

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Solution

The fourth proportional to 73,979.72, 102,092.10 and 40,445.72 is: 55,815.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,979.72 : 102,092.10 = 40,445.72 : x
  2. Step 2: Convert to fraction form
    73,979.72/102,092.10 = 40,445.72/x
  3. Step 3: Cross multiply
    73,979.72x = 102,092.10 × 40,445.72
  4. Step 4: Simplify right side
    73,979.72x = 4,129,188,490.81
  5. Step 5: Solve for x
    x = 4,129,188,490.81/73,979.72
  6. Step 6: Final answer
    x = 55,815.14

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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.