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Finding the Fourth Proportional to 220,807.20, 331,048.80 and 87,621.60

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Solution

The fourth proportional to 220,807.20, 331,048.80 and 87,621.60 is: 131,368.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,807.20 : 331,048.80 = 87,621.60 : x
  2. Step 2: Convert to fraction form
    220,807.20/331,048.80 = 87,621.60/x
  3. Step 3: Cross multiply
    220,807.20x = 331,048.80 × 87,621.60
  4. Step 4: Simplify right side
    220,807.20x = 29,007,025,534.08
  5. Step 5: Solve for x
    x = 29,007,025,534.08/220,807.20
  6. Step 6: Final answer
    x = 131,368.11

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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.