Home / 100,376.10-138,518.60-55,052.88

Finding the Fourth Proportional to 100,376.10, 138,518.60 and 55,052.88

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Solution

The fourth proportional to 100,376.10, 138,518.60 and 55,052.88 is: 75,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,376.10 : 138,518.60 = 55,052.88 : x
  2. Step 2: Convert to fraction form
    100,376.10/138,518.60 = 55,052.88/x
  3. Step 3: Cross multiply
    100,376.10x = 138,518.60 × 55,052.88
  4. Step 4: Simplify right side
    100,376.10x = 7,625,847,863.57
  5. Step 5: Solve for x
    x = 7,625,847,863.57/100,376.10
  6. Step 6: Final answer
    x = 75,972.75

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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.