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Finding the Fourth Proportional to 159,783.40, 239,828.70 and 80,986.60

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Solution

The fourth proportional to 159,783.40, 239,828.70 and 80,986.60 is: 121,557.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,783.40 : 239,828.70 = 80,986.60 : x
  2. Step 2: Convert to fraction form
    159,783.40/239,828.70 = 80,986.60/x
  3. Step 3: Cross multiply
    159,783.40x = 239,828.70 × 80,986.60
  4. Step 4: Simplify right side
    159,783.40x = 19,422,910,995.42
  5. Step 5: Solve for x
    x = 19,422,910,995.42/159,783.40
  6. Step 6: Final answer
    x = 121,557.75

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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.