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Finding the Fourth Proportional to 131,427.90, 197,239.05 and 87,039.90

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Solution

The fourth proportional to 131,427.90, 197,239.05 and 87,039.90 is: 130,624.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,427.90 : 197,239.05 = 87,039.90 : x
  2. Step 2: Convert to fraction form
    131,427.90/197,239.05 = 87,039.90/x
  3. Step 3: Cross multiply
    131,427.90x = 197,239.05 × 87,039.90
  4. Step 4: Simplify right side
    131,427.90x = 17,167,667,188.10
  5. Step 5: Solve for x
    x = 17,167,667,188.10/131,427.90
  6. Step 6: Final answer
    x = 130,624.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.