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Finding the Fourth Proportional to 80,603.19, 120,906 and 28,014.48

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Solution

The fourth proportional to 80,603.19, 120,906 and 28,014.48 is: 42,022.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,603.19 : 120,906 = 28,014.48 : x
  2. Step 2: Convert to fraction form
    80,603.19/120,906 = 28,014.48/x
  3. Step 3: Cross multiply
    80,603.19x = 120,906 × 28,014.48
  4. Step 4: Simplify right side
    80,603.19x = 3,387,118,718.88
  5. Step 5: Solve for x
    x = 3,387,118,718.88/80,603.19
  6. Step 6: Final answer
    x = 42,022.14

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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.