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Finding the Fourth Proportional to 159,172.21, 219,663.66 and 87,558.49

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Solution

The fourth proportional to 159,172.21, 219,663.66 and 87,558.49 is: 120,834.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,172.21 : 219,663.66 = 87,558.49 : x
  2. Step 2: Convert to fraction form
    159,172.21/219,663.66 = 87,558.49/x
  3. Step 3: Cross multiply
    159,172.21x = 219,663.66 × 87,558.49
  4. Step 4: Simplify right side
    159,172.21x = 19,233,418,377.47
  5. Step 5: Solve for x
    x = 19,233,418,377.47/159,172.21
  6. Step 6: Final answer
    x = 120,834.02

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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.