Home / 159,138.12-219,611.40-87,522.72

Finding the Fourth Proportional to 159,138.12, 219,611.40 and 87,522.72

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Solution

The fourth proportional to 159,138.12, 219,611.40 and 87,522.72 is: 120,781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,138.12 : 219,611.40 = 87,522.72 : x
  2. Step 2: Convert to fraction form
    159,138.12/219,611.40 = 87,522.72/x
  3. Step 3: Cross multiply
    159,138.12x = 219,611.40 × 87,522.72
  4. Step 4: Simplify right side
    159,138.12x = 19,220,987,071.01
  5. Step 5: Solve for x
    x = 19,220,987,071.01/159,138.12
  6. Step 6: Final answer
    x = 120,781.79

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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.