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Finding the Fourth Proportional to 239,658.95, 359,674.05 and 90,035.21

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Solution

The fourth proportional to 239,658.95, 359,674.05 and 90,035.21 is: 135,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,658.95 : 359,674.05 = 90,035.21 : x
  2. Step 2: Convert to fraction form
    239,658.95/359,674.05 = 90,035.21/x
  3. Step 3: Cross multiply
    239,658.95x = 359,674.05 × 90,035.21
  4. Step 4: Simplify right side
    239,658.95x = 32,383,329,860.12
  5. Step 5: Solve for x
    x = 32,383,329,860.12/239,658.95
  6. Step 6: Final answer
    x = 135,122.55

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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.