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Finding the Fourth Proportional to 64,380.80, 96,571.20 and 20,007.20

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Solution

The fourth proportional to 64,380.80, 96,571.20 and 20,007.20 is: 30,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,380.80 : 96,571.20 = 20,007.20 : x
  2. Step 2: Convert to fraction form
    64,380.80/96,571.20 = 20,007.20/x
  3. Step 3: Cross multiply
    64,380.80x = 96,571.20 × 20,007.20
  4. Step 4: Simplify right side
    64,380.80x = 1,932,119,312.64
  5. Step 5: Solve for x
    x = 1,932,119,312.64/64,380.80
  6. Step 6: Final answer
    x = 30,010.80

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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.