Home / 74,621.28-102,979.89-40,631.09

Finding the Fourth Proportional to 74,621.28, 102,979.89 and 40,631.09

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Solution

The fourth proportional to 74,621.28, 102,979.89 and 40,631.09 is: 56,072.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,621.28 : 102,979.89 = 40,631.09 : x
  2. Step 2: Convert to fraction form
    74,621.28/102,979.89 = 40,631.09/x
  3. Step 3: Cross multiply
    74,621.28x = 102,979.89 × 40,631.09
  4. Step 4: Simplify right side
    74,621.28x = 4,184,184,663.88
  5. Step 5: Solve for x
    x = 4,184,184,663.88/74,621.28
  6. Step 6: Final answer
    x = 56,072.27

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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.