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Finding the Fourth Proportional to 74,873.78, 103,329.99 and 40,885.43

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Solution

The fourth proportional to 74,873.78, 103,329.99 and 40,885.43 is: 56,424.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,873.78 : 103,329.99 = 40,885.43 : x
  2. Step 2: Convert to fraction form
    74,873.78/103,329.99 = 40,885.43/x
  3. Step 3: Cross multiply
    74,873.78x = 103,329.99 × 40,885.43
  4. Step 4: Simplify right side
    74,873.78x = 4,224,690,556.40
  5. Step 5: Solve for x
    x = 4,224,690,556.40/74,873.78
  6. Step 6: Final answer
    x = 56,424.17

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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.