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Finding the Fourth Proportional to 74,930.48, 103,406.08 and 40,940.40

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Solution

The fourth proportional to 74,930.48, 103,406.08 and 40,940.40 is: 56,498.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,930.48 : 103,406.08 = 40,940.40 : x
  2. Step 2: Convert to fraction form
    74,930.48/103,406.08 = 40,940.40/x
  3. Step 3: Cross multiply
    74,930.48x = 103,406.08 × 40,940.40
  4. Step 4: Simplify right side
    74,930.48x = 4,233,486,277.63
  5. Step 5: Solve for x
    x = 4,233,486,277.63/74,930.48
  6. Step 6: Final answer
    x = 56,498.85

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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.