Home / 120,981.54-181,354.05-54,438.42

Finding the Fourth Proportional to 120,981.54, 181,354.05 and 54,438.42

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Solution

The fourth proportional to 120,981.54, 181,354.05 and 54,438.42 is: 81,604.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,981.54 : 181,354.05 = 54,438.42 : x
  2. Step 2: Convert to fraction form
    120,981.54/181,354.05 = 54,438.42/x
  3. Step 3: Cross multiply
    120,981.54x = 181,354.05 × 54,438.42
  4. Step 4: Simplify right side
    120,981.54x = 9,872,627,942.60
  5. Step 5: Solve for x
    x = 9,872,627,942.60/120,981.54
  6. Step 6: Final answer
    x = 81,604.42

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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.