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Finding the Fourth Proportional to 158,611.77, 218,884.48 and 86,992.21

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Solution

The fourth proportional to 158,611.77, 218,884.48 and 86,992.21 is: 120,049.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,611.77 : 218,884.48 = 86,992.21 : x
  2. Step 2: Convert to fraction form
    158,611.77/218,884.48 = 86,992.21/x
  3. Step 3: Cross multiply
    158,611.77x = 218,884.48 × 86,992.21
  4. Step 4: Simplify right side
    158,611.77x = 19,041,244,706.03
  5. Step 5: Solve for x
    x = 19,041,244,706.03/158,611.77
  6. Step 6: Final answer
    x = 120,049.38

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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.