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Finding the Fourth Proportional to 239,676.90, 359,488.78 and 85,796.79

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Solution

The fourth proportional to 239,676.90, 359,488.78 and 85,796.79 is: 128,685.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,676.90 : 359,488.78 = 85,796.79 : x
  2. Step 2: Convert to fraction form
    239,676.90/359,488.78 = 85,796.79/x
  3. Step 3: Cross multiply
    239,676.90x = 359,488.78 × 85,796.79
  4. Step 4: Simplify right side
    239,676.90x = 30,842,983,365.02
  5. Step 5: Solve for x
    x = 30,842,983,365.02/239,676.90
  6. Step 6: Final answer
    x = 128,685.67

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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.