Home / 74,621.90-102,974.78-40,630.28

Finding the Fourth Proportional to 74,621.90, 102,974.78 and 40,630.28

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Solution

The fourth proportional to 74,621.90, 102,974.78 and 40,630.28 is: 56,067.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,621.90 : 102,974.78 = 40,630.28 : x
  2. Step 2: Convert to fraction form
    74,621.90/102,974.78 = 40,630.28/x
  3. Step 3: Cross multiply
    74,621.90x = 102,974.78 × 40,630.28
  4. Step 4: Simplify right side
    74,621.90x = 4,183,894,144.34
  5. Step 5: Solve for x
    x = 4,183,894,144.34/74,621.90
  6. Step 6: Final answer
    x = 56,067.91

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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.