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Finding the Fourth Proportional to 289,919.80, 434,860.14 and 79,540.12

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Solution

The fourth proportional to 289,919.80, 434,860.14 and 79,540.12 is: 119,304.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,919.80 : 434,860.14 = 79,540.12 : x
  2. Step 2: Convert to fraction form
    289,919.80/434,860.14 = 79,540.12/x
  3. Step 3: Cross multiply
    289,919.80x = 434,860.14 × 79,540.12
  4. Step 4: Simplify right side
    289,919.80x = 34,588,827,718.82
  5. Step 5: Solve for x
    x = 34,588,827,718.82/289,919.80
  6. Step 6: Final answer
    x = 119,304.81

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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.