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Finding the Fourth Proportional to 159,954.14, 220,779.47 and 91,978.54

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Solution

The fourth proportional to 159,954.14, 220,779.47 and 91,978.54 is: 126,954.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,954.14 : 220,779.47 = 91,978.54 : x
  2. Step 2: Convert to fraction form
    159,954.14/220,779.47 = 91,978.54/x
  3. Step 3: Cross multiply
    159,954.14x = 220,779.47 × 91,978.54
  4. Step 4: Simplify right side
    159,954.14x = 20,306,972,990.57
  5. Step 5: Solve for x
    x = 20,306,972,990.57/159,954.14
  6. Step 6: Final answer
    x = 126,954.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.