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Finding the Fourth Proportional to 159,914.88, 220,679.10 and 87,316.20

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Solution

The fourth proportional to 159,914.88, 220,679.10 and 87,316.20 is: 120,494.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,914.88 : 220,679.10 = 87,316.20 : x
  2. Step 2: Convert to fraction form
    159,914.88/220,679.10 = 87,316.20/x
  3. Step 3: Cross multiply
    159,914.88x = 220,679.10 × 87,316.20
  4. Step 4: Simplify right side
    159,914.88x = 19,268,860,431.42
  5. Step 5: Solve for x
    x = 19,268,860,431.42/159,914.88
  6. Step 6: Final answer
    x = 120,494.48

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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.