Home / 100,155.27-138,230.49-57,135.77

Finding the Fourth Proportional to 100,155.27, 138,230.49 and 57,135.77

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Solution

The fourth proportional to 100,155.27, 138,230.49 and 57,135.77 is: 78,856.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,155.27 : 138,230.49 = 57,135.77 : x
  2. Step 2: Convert to fraction form
    100,155.27/138,230.49 = 57,135.77/x
  3. Step 3: Cross multiply
    100,155.27x = 138,230.49 × 57,135.77
  4. Step 4: Simplify right side
    100,155.27x = 7,897,904,792.47
  5. Step 5: Solve for x
    x = 7,897,904,792.47/100,155.27
  6. Step 6: Final answer
    x = 78,856.61

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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.