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Finding the Fourth Proportional to 117,479.85, 162,121.65 and 63,764.40

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Solution

The fourth proportional to 117,479.85, 162,121.65 and 63,764.40 is: 87,994.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,479.85 : 162,121.65 = 63,764.40 : x
  2. Step 2: Convert to fraction form
    117,479.85/162,121.65 = 63,764.40/x
  3. Step 3: Cross multiply
    117,479.85x = 162,121.65 × 63,764.40
  4. Step 4: Simplify right side
    117,479.85x = 10,337,589,739.26
  5. Step 5: Solve for x
    x = 10,337,589,739.26/117,479.85
  6. Step 6: Final answer
    x = 87,994.58

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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.