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Finding the Fourth Proportional to 117,478.37, 162,120.21 and 63,763.31

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Solution

The fourth proportional to 117,478.37, 162,120.21 and 63,763.31 is: 87,993.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,478.37 : 162,120.21 = 63,763.31 : x
  2. Step 2: Convert to fraction form
    117,478.37/162,120.21 = 63,763.31/x
  3. Step 3: Cross multiply
    117,478.37x = 162,120.21 × 63,763.31
  4. Step 4: Simplify right side
    117,478.37x = 10,337,321,207.50
  5. Step 5: Solve for x
    x = 10,337,321,207.50/117,478.37
  6. Step 6: Final answer
    x = 87,993.40

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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.