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Finding the Fourth Proportional to 159,965.68, 220,754.15 and 91,051.78

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Solution

The fourth proportional to 159,965.68, 220,754.15 and 91,051.78 is: 125,652.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,965.68 : 220,754.15 = 91,051.78 : x
  2. Step 2: Convert to fraction form
    159,965.68/220,754.15 = 91,051.78/x
  3. Step 3: Cross multiply
    159,965.68x = 220,754.15 × 91,051.78
  4. Step 4: Simplify right side
    159,965.68x = 20,100,056,988.75
  5. Step 5: Solve for x
    x = 20,100,056,988.75/159,965.68
  6. Step 6: Final answer
    x = 125,652.31

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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.