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Finding the Fourth Proportional to 86,907.85, 130,361.78 and 67,224.85

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Solution

The fourth proportional to 86,907.85, 130,361.78 and 67,224.85 is: 100,837.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907.85 : 130,361.78 = 67,224.85 : x
  2. Step 2: Convert to fraction form
    86,907.85/130,361.78 = 67,224.85/x
  3. Step 3: Cross multiply
    86,907.85x = 130,361.78 × 67,224.85
  4. Step 4: Simplify right side
    86,907.85x = 8,763,550,770.11
  5. Step 5: Solve for x
    x = 8,763,550,770.11/86,907.85
  6. Step 6: Final answer
    x = 100,837.28

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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.