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Finding the Fourth Proportional to 159,300.70, 219,833.28 and 87,679.18

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Solution

The fourth proportional to 159,300.70, 219,833.28 and 87,679.18 is: 120,996.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,300.70 : 219,833.28 = 87,679.18 : x
  2. Step 2: Convert to fraction form
    159,300.70/219,833.28 = 87,679.18/x
  3. Step 3: Cross multiply
    159,300.70x = 219,833.28 × 87,679.18
  4. Step 4: Simplify right side
    159,300.70x = 19,274,801,727.11
  5. Step 5: Solve for x
    x = 19,274,801,727.11/159,300.70
  6. Step 6: Final answer
    x = 120,996.34

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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.