Home / 100,123.50-138,170.51-54,801.44

Finding the Fourth Proportional to 100,123.50, 138,170.51 and 54,801.44

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Solution

The fourth proportional to 100,123.50, 138,170.51 and 54,801.44 is: 75,626.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,123.50 : 138,170.51 = 54,801.44 : x
  2. Step 2: Convert to fraction form
    100,123.50/138,170.51 = 54,801.44/x
  3. Step 3: Cross multiply
    100,123.50x = 138,170.51 × 54,801.44
  4. Step 4: Simplify right side
    100,123.50x = 7,571,942,913.53
  5. Step 5: Solve for x
    x = 7,571,942,913.53/100,123.50
  6. Step 6: Final answer
    x = 75,626.03

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1.5x scale

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.