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Finding the Fourth Proportional to 158,940.82, 219,351.81 and 87,335.20

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Solution

The fourth proportional to 158,940.82, 219,351.81 and 87,335.20 is: 120,529.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,940.82 : 219,351.81 = 87,335.20 : x
  2. Step 2: Convert to fraction form
    158,940.82/219,351.81 = 87,335.20/x
  3. Step 3: Cross multiply
    158,940.82x = 219,351.81 × 87,335.20
  4. Step 4: Simplify right side
    158,940.82x = 19,157,134,196.71
  5. Step 5: Solve for x
    x = 19,157,134,196.71/158,940.82
  6. Step 6: Final answer
    x = 120,529.98

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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.