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Finding the Fourth Proportional to 120,019.91, 179,903.49 and 40,036.46

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Solution

The fourth proportional to 120,019.91, 179,903.49 and 40,036.46 is: 60,012.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,019.91 : 179,903.49 = 40,036.46 : x
  2. Step 2: Convert to fraction form
    120,019.91/179,903.49 = 40,036.46/x
  3. Step 3: Cross multiply
    120,019.91x = 179,903.49 × 40,036.46
  4. Step 4: Simplify right side
    120,019.91x = 7,202,697,981.73
  5. Step 5: Solve for x
    x = 7,202,697,981.73/120,019.91
  6. Step 6: Final answer
    x = 60,012.53

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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.