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Finding the Fourth Proportional to 63,221.87, 87,258.41 and 40,589.45

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Solution

The fourth proportional to 63,221.87, 87,258.41 and 40,589.45 is: 56,021.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,221.87 : 87,258.41 = 40,589.45 : x
  2. Step 2: Convert to fraction form
    63,221.87/87,258.41 = 40,589.45/x
  3. Step 3: Cross multiply
    63,221.87x = 87,258.41 × 40,589.45
  4. Step 4: Simplify right side
    63,221.87x = 3,541,771,429.11
  5. Step 5: Solve for x
    x = 3,541,771,429.11/63,221.87
  6. Step 6: Final answer
    x = 56,021.30

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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.