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Finding the Fourth Proportional to 86,906.35, 130,359.53 and 67,223.35

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Solution

The fourth proportional to 86,906.35, 130,359.53 and 67,223.35 is: 100,835.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,906.35 : 130,359.53 = 67,223.35 : x
  2. Step 2: Convert to fraction form
    86,906.35/130,359.53 = 67,223.35/x
  3. Step 3: Cross multiply
    86,906.35x = 130,359.53 × 67,223.35
  4. Step 4: Simplify right side
    86,906.35x = 8,763,203,974.91
  5. Step 5: Solve for x
    x = 8,763,203,974.91/86,906.35
  6. Step 6: Final answer
    x = 100,835.03

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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.