Home / 100,195.21-138,269.60-54,255.36

Finding the Fourth Proportional to 100,195.21, 138,269.60 and 54,255.36

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Solution

The fourth proportional to 100,195.21, 138,269.60 and 54,255.36 is: 74,872.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,195.21 : 138,269.60 = 54,255.36 : x
  2. Step 2: Convert to fraction form
    100,195.21/138,269.60 = 54,255.36/x
  3. Step 3: Cross multiply
    100,195.21x = 138,269.60 × 54,255.36
  4. Step 4: Simplify right side
    100,195.21x = 7,501,866,233.71
  5. Step 5: Solve for x
    x = 7,501,866,233.71/100,195.21
  6. Step 6: Final answer
    x = 74,872.51

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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.