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Finding the Fourth Proportional to 80,569.93, 120,889.11 and 43,120.30

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Solution

The fourth proportional to 80,569.93, 120,889.11 and 43,120.30 is: 64,698.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,569.93 : 120,889.11 = 43,120.30 : x
  2. Step 2: Convert to fraction form
    80,569.93/120,889.11 = 43,120.30/x
  3. Step 3: Cross multiply
    80,569.93x = 120,889.11 × 43,120.30
  4. Step 4: Simplify right side
    80,569.93x = 5,212,774,689.93
  5. Step 5: Solve for x
    x = 5,212,774,689.93/80,569.93
  6. Step 6: Final answer
    x = 64,698.76

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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.