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Finding the Fourth Proportional to 125,915.68, 188,917.28 and 55,844.32

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Solution

The fourth proportional to 125,915.68, 188,917.28 and 55,844.32 is: 83,785.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,915.68 : 188,917.28 = 55,844.32 : x
  2. Step 2: Convert to fraction form
    125,915.68/188,917.28 = 55,844.32/x
  3. Step 3: Cross multiply
    125,915.68x = 188,917.28 × 55,844.32
  4. Step 4: Simplify right side
    125,915.68x = 10,549,957,037.85
  5. Step 5: Solve for x
    x = 10,549,957,037.85/125,915.68
  6. Step 6: Final answer
    x = 83,785.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.