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Finding the Fourth Proportional to 158,608.53, 218,885.90 and 86,991.57

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Solution

The fourth proportional to 158,608.53, 218,885.90 and 86,991.57 is: 120,051.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,608.53 : 218,885.90 = 86,991.57 : x
  2. Step 2: Convert to fraction form
    158,608.53/218,885.90 = 86,991.57/x
  3. Step 3: Cross multiply
    158,608.53x = 218,885.90 × 86,991.57
  4. Step 4: Simplify right side
    158,608.53x = 19,041,227,656.91
  5. Step 5: Solve for x
    x = 19,041,227,656.91/158,608.53
  6. Step 6: Final answer
    x = 120,051.73

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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.