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Finding the Fourth Proportional to 74,882.90, 103,342.58 and 40,894.54

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Solution

The fourth proportional to 74,882.90, 103,342.58 and 40,894.54 is: 56,436.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,882.90 : 103,342.58 = 40,894.54 : x
  2. Step 2: Convert to fraction form
    74,882.90/103,342.58 = 40,894.54/x
  3. Step 3: Cross multiply
    74,882.90x = 103,342.58 × 40,894.54
  4. Step 4: Simplify right side
    74,882.90x = 4,226,147,271.51
  5. Step 5: Solve for x
    x = 4,226,147,271.51/74,882.90
  6. Step 6: Final answer
    x = 56,436.75

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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.