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Finding the Fourth Proportional to 74,073, 102,220.92 and 40,539

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Solution

The fourth proportional to 74,073, 102,220.92 and 40,539 is: 55,943.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,073 : 102,220.92 = 40,539 : x
  2. Step 2: Convert to fraction form
    74,073/102,220.92 = 40,539/x
  3. Step 3: Cross multiply
    74,073x = 102,220.92 × 40,539
  4. Step 4: Simplify right side
    74,073x = 4,143,933,875.88
  5. Step 5: Solve for x
    x = 4,143,933,875.88/74,073
  6. Step 6: Final answer
    x = 55,943.92

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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.