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Finding the Fourth Proportional to 74,930.60, 103,399.56 and 40,932.20

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Solution

The fourth proportional to 74,930.60, 103,399.56 and 40,932.20 is: 56,483.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,930.60 : 103,399.56 = 40,932.20 : x
  2. Step 2: Convert to fraction form
    74,930.60/103,399.56 = 40,932.20/x
  3. Step 3: Cross multiply
    74,930.60x = 103,399.56 × 40,932.20
  4. Step 4: Simplify right side
    74,930.60x = 4,232,371,469.83
  5. Step 5: Solve for x
    x = 4,232,371,469.83/74,930.60
  6. Step 6: Final answer
    x = 56,483.89

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1.5x scale

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.