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Finding the Fourth Proportional to 86,705.36, 130,040.76 and 39,951.44

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Solution

The fourth proportional to 86,705.36, 130,040.76 and 39,951.44 is: 59,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,705.36 : 130,040.76 = 39,951.44 : x
  2. Step 2: Convert to fraction form
    86,705.36/130,040.76 = 39,951.44/x
  3. Step 3: Cross multiply
    86,705.36x = 130,040.76 × 39,951.44
  4. Step 4: Simplify right side
    86,705.36x = 5,195,315,620.69
  5. Step 5: Solve for x
    x = 5,195,315,620.69/86,705.36
  6. Step 6: Final answer
    x = 59,919.20

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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.