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Finding the Fourth Proportional to 120,019.49, 179,989.67 and 40,035.42

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Solution

The fourth proportional to 120,019.49, 179,989.67 and 40,035.42 is: 60,039.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,019.49 : 179,989.67 = 40,035.42 : x
  2. Step 2: Convert to fraction form
    120,019.49/179,989.67 = 40,035.42/x
  3. Step 3: Cross multiply
    120,019.49x = 179,989.67 × 40,035.42
  4. Step 4: Simplify right side
    120,019.49x = 7,205,962,134.20
  5. Step 5: Solve for x
    x = 7,205,962,134.20/120,019.49
  6. Step 6: Final answer
    x = 60,039.93

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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.