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Finding the Fourth Proportional to 239,425.39, 359,138.09 and 81,655.21

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Solution

The fourth proportional to 239,425.39, 359,138.09 and 81,655.21 is: 122,482.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,425.39 : 359,138.09 = 81,655.21 : x
  2. Step 2: Convert to fraction form
    239,425.39/359,138.09 = 81,655.21/x
  3. Step 3: Cross multiply
    239,425.39x = 359,138.09 × 81,655.21
  4. Step 4: Simplify right side
    239,425.39x = 29,325,496,157.95
  5. Step 5: Solve for x
    x = 29,325,496,157.95/239,425.39
  6. Step 6: Final answer
    x = 122,482.82

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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.