Home / 103,168.28-142,431.21-78,924.57

Finding the Fourth Proportional to 103,168.28, 142,431.21 and 78,924.57

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Solution

The fourth proportional to 103,168.28, 142,431.21 and 78,924.57 is: 108,961.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,168.28 : 142,431.21 = 78,924.57 : x
  2. Step 2: Convert to fraction form
    103,168.28/142,431.21 = 78,924.57/x
  3. Step 3: Cross multiply
    103,168.28x = 142,431.21 × 78,924.57
  4. Step 4: Simplify right side
    103,168.28x = 11,241,322,003.83
  5. Step 5: Solve for x
    x = 11,241,322,003.83/103,168.28
  6. Step 6: Final answer
    x = 108,961.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.