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Finding the Fourth Proportional to 86,778.62, 130,074.78 and 36,816.56

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Solution

The fourth proportional to 86,778.62, 130,074.78 and 36,816.56 is: 55,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,778.62 : 130,074.78 = 36,816.56 : x
  2. Step 2: Convert to fraction form
    86,778.62/130,074.78 = 36,816.56/x
  3. Step 3: Cross multiply
    86,778.62x = 130,074.78 × 36,816.56
  4. Step 4: Simplify right side
    86,778.62x = 4,788,905,942.36
  5. Step 5: Solve for x
    x = 4,788,905,942.36/86,778.62
  6. Step 6: Final answer
    x = 55,185.32

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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.