Home / 158,721.35-219,039.05-87,105.92

Finding the Fourth Proportional to 158,721.35, 219,039.05 and 87,105.92

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Solution

The fourth proportional to 158,721.35, 219,039.05 and 87,105.92 is: 120,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,721.35 : 219,039.05 = 87,105.92 : x
  2. Step 2: Convert to fraction form
    158,721.35/219,039.05 = 87,105.92/x
  3. Step 3: Cross multiply
    158,721.35x = 219,039.05 × 87,105.92
  4. Step 4: Simplify right side
    158,721.35x = 19,079,597,088.75
  5. Step 5: Solve for x
    x = 19,079,597,088.75/158,721.35
  6. Step 6: Final answer
    x = 120,208.14

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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.