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Finding the Fourth Proportional to 125,396.38, 188,151.81 and 68,488.21

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Solution

The fourth proportional to 125,396.38, 188,151.81 and 68,488.21 is: 102,763.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,396.38 : 188,151.81 = 68,488.21 : x
  2. Step 2: Convert to fraction form
    125,396.38/188,151.81 = 68,488.21/x
  3. Step 3: Cross multiply
    125,396.38x = 188,151.81 × 68,488.21
  4. Step 4: Simplify right side
    125,396.38x = 12,886,180,675.16
  5. Step 5: Solve for x
    x = 12,886,180,675.16/125,396.38
  6. Step 6: Final answer
    x = 102,763.58

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1.5x scale

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.