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Finding the Fourth Proportional to 125,930.45, 188,895.47 and 86,367.62

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Solution

The fourth proportional to 125,930.45, 188,895.47 and 86,367.62 is: 129,551.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,930.45 : 188,895.47 = 86,367.62 : x
  2. Step 2: Convert to fraction form
    125,930.45/188,895.47 = 86,367.62/x
  3. Step 3: Cross multiply
    125,930.45x = 188,895.47 × 86,367.62
  4. Step 4: Simplify right side
    125,930.45x = 16,314,452,172.68
  5. Step 5: Solve for x
    x = 16,314,452,172.68/125,930.45
  6. Step 6: Final answer
    x = 129,551.29

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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.