Home / 100,177.40-138,224.94-57,155.78

Finding the Fourth Proportional to 100,177.40, 138,224.94 and 57,155.78

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Solution

The fourth proportional to 100,177.40, 138,224.94 and 57,155.78 is: 78,863.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,177.40 : 138,224.94 = 57,155.78 : x
  2. Step 2: Convert to fraction form
    100,177.40/138,224.94 = 57,155.78/x
  3. Step 3: Cross multiply
    100,177.40x = 138,224.94 × 57,155.78
  4. Step 4: Simplify right side
    100,177.40x = 7,900,354,261.15
  5. Step 5: Solve for x
    x = 7,900,354,261.15/100,177.40
  6. Step 6: Final answer
    x = 78,863.64

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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.