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Finding the Fourth Proportional to 125,396.88, 188,152.56 and 68,488.71

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Solution

The fourth proportional to 125,396.88, 188,152.56 and 68,488.71 is: 102,764.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,396.88 : 188,152.56 = 68,488.71 : x
  2. Step 2: Convert to fraction form
    125,396.88/188,152.56 = 68,488.71/x
  3. Step 3: Cross multiply
    125,396.88x = 188,152.56 × 68,488.71
  4. Step 4: Simplify right side
    125,396.88x = 12,886,326,117.60
  5. Step 5: Solve for x
    x = 12,886,326,117.60/125,396.88
  6. Step 6: Final answer
    x = 102,764.33

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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.