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Finding the Fourth Proportional to 80,594.44, 120,891.54 and 21,430.12

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Solution

The fourth proportional to 80,594.44, 120,891.54 and 21,430.12 is: 32,145.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,594.44 : 120,891.54 = 21,430.12 : x
  2. Step 2: Convert to fraction form
    80,594.44/120,891.54 = 21,430.12/x
  3. Step 3: Cross multiply
    80,594.44x = 120,891.54 × 21,430.12
  4. Step 4: Simplify right side
    80,594.44x = 2,590,720,209.18
  5. Step 5: Solve for x
    x = 2,590,720,209.18/80,594.44
  6. Step 6: Final answer
    x = 32,145.15

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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.