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Finding the Fourth Proportional to 220,651.20, 330,814.80 and 87,465.60

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Solution

The fourth proportional to 220,651.20, 330,814.80 and 87,465.60 is: 131,134.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,651.20 : 330,814.80 = 87,465.60 : x
  2. Step 2: Convert to fraction form
    220,651.20/330,814.80 = 87,465.60/x
  3. Step 3: Cross multiply
    220,651.20x = 330,814.80 × 87,465.60
  4. Step 4: Simplify right side
    220,651.20x = 28,934,914,970.88
  5. Step 5: Solve for x
    x = 28,934,914,970.88/220,651.20
  6. Step 6: Final answer
    x = 131,134.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.