Home / 159,048.72-219,489.96-87,431.76

Finding the Fourth Proportional to 159,048.72, 219,489.96 and 87,431.76

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Solution

The fourth proportional to 159,048.72, 219,489.96 and 87,431.76 is: 120,657.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,048.72 : 219,489.96 = 87,431.76 : x
  2. Step 2: Convert to fraction form
    159,048.72/219,489.96 = 87,431.76/x
  3. Step 3: Cross multiply
    159,048.72x = 219,489.96 × 87,431.76
  4. Step 4: Simplify right side
    159,048.72x = 19,190,393,505.13
  5. Step 5: Solve for x
    x = 19,190,393,505.13/159,048.72
  6. Step 6: Final answer
    x = 120,657.33

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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.