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Finding the Fourth Proportional to 92,992.21, 128,330 and 50,550.64

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Solution

The fourth proportional to 92,992.21, 128,330 and 50,550.64 is: 69,760.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,992.21 : 128,330 = 50,550.64 : x
  2. Step 2: Convert to fraction form
    92,992.21/128,330 = 50,550.64/x
  3. Step 3: Cross multiply
    92,992.21x = 128,330 × 50,550.64
  4. Step 4: Simplify right side
    92,992.21x = 6,487,163,631.20
  5. Step 5: Solve for x
    x = 6,487,163,631.20/92,992.21
  6. Step 6: Final answer
    x = 69,760.29

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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.