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Finding the Fourth Proportional to 159,132.51, 219,598.48 and 87,512.53

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Solution

The fourth proportional to 159,132.51, 219,598.48 and 87,512.53 is: 120,764.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,132.51 : 219,598.48 = 87,512.53 : x
  2. Step 2: Convert to fraction form
    159,132.51/219,598.48 = 87,512.53/x
  3. Step 3: Cross multiply
    159,132.51x = 219,598.48 × 87,512.53
  4. Step 4: Simplify right side
    159,132.51x = 19,217,618,568.95
  5. Step 5: Solve for x
    x = 19,217,618,568.95/159,132.51
  6. Step 6: Final answer
    x = 120,764.88

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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.