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Finding the Fourth Proportional to 158,719.91, 219,039.80 and 87,102.50

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Solution

The fourth proportional to 158,719.91, 219,039.80 and 87,102.50 is: 120,204.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,719.91 : 219,039.80 = 87,102.50 : x
  2. Step 2: Convert to fraction form
    158,719.91/219,039.80 = 87,102.50/x
  3. Step 3: Cross multiply
    158,719.91x = 219,039.80 × 87,102.50
  4. Step 4: Simplify right side
    158,719.91x = 19,078,914,179.50
  5. Step 5: Solve for x
    x = 19,078,914,179.50/158,719.91
  6. Step 6: Final answer
    x = 120,204.92

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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.