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Finding the Fourth Proportional to 159,611.42, 220,265.25 and 87,993.98

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Solution

The fourth proportional to 159,611.42, 220,265.25 and 87,993.98 is: 121,432.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,611.42 : 220,265.25 = 87,993.98 : x
  2. Step 2: Convert to fraction form
    159,611.42/220,265.25 = 87,993.98/x
  3. Step 3: Cross multiply
    159,611.42x = 220,265.25 × 87,993.98
  4. Step 4: Simplify right side
    159,611.42x = 19,382,016,003.20
  5. Step 5: Solve for x
    x = 19,382,016,003.20/159,611.42
  6. Step 6: Final answer
    x = 121,432.51

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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.