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Finding the Fourth Proportional to 74,880.90, 103,339.82 and 40,892.54

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Solution

The fourth proportional to 74,880.90, 103,339.82 and 40,892.54 is: 56,433.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,880.90 : 103,339.82 = 40,892.54 : x
  2. Step 2: Convert to fraction form
    74,880.90/103,339.82 = 40,892.54/x
  3. Step 3: Cross multiply
    74,880.90x = 103,339.82 × 40,892.54
  4. Step 4: Simplify right side
    74,880.90x = 4,225,827,722.94
  5. Step 5: Solve for x
    x = 4,225,827,722.94/74,880.90
  6. Step 6: Final answer
    x = 56,433.99

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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.