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Finding the Fourth Proportional to 80,655.36, 120,904.20 and 36,293.28

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Solution

The fourth proportional to 80,655.36, 120,904.20 and 36,293.28 is: 54,404.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,655.36 : 120,904.20 = 36,293.28 : x
  2. Step 2: Convert to fraction form
    80,655.36/120,904.20 = 36,293.28/x
  3. Step 3: Cross multiply
    80,655.36x = 120,904.20 × 36,293.28
  4. Step 4: Simplify right side
    80,655.36x = 4,388,009,983.78
  5. Step 5: Solve for x
    x = 4,388,009,983.78/80,655.36
  6. Step 6: Final answer
    x = 54,404.44

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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.