Home / 100,206.72-138,250.95-57,155.27

Finding the Fourth Proportional to 100,206.72, 138,250.95 and 57,155.27

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Solution

The fourth proportional to 100,206.72, 138,250.95 and 57,155.27 is: 78,854.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,206.72 : 138,250.95 = 57,155.27 : x
  2. Step 2: Convert to fraction form
    100,206.72/138,250.95 = 57,155.27/x
  3. Step 3: Cross multiply
    100,206.72x = 138,250.95 × 57,155.27
  4. Step 4: Simplify right side
    100,206.72x = 7,901,770,568.58
  5. Step 5: Solve for x
    x = 7,901,770,568.58/100,206.72
  6. Step 6: Final answer
    x = 78,854.70

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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.