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Finding the Fourth Proportional to 159,165.56, 219,646.13 and 87,541.31

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Solution

The fourth proportional to 159,165.56, 219,646.13 and 87,541.31 is: 120,805.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,165.56 : 219,646.13 = 87,541.31 : x
  2. Step 2: Convert to fraction form
    159,165.56/219,646.13 = 87,541.31/x
  3. Step 3: Cross multiply
    159,165.56x = 219,646.13 × 87,541.31
  4. Step 4: Simplify right side
    159,165.56x = 19,228,108,420.69
  5. Step 5: Solve for x
    x = 19,228,108,420.69/159,165.56
  6. Step 6: Final answer
    x = 120,805.71

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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.