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Finding the Fourth Proportional to 125,925.40, 188,450.70 and 115,427.80

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Solution

The fourth proportional to 125,925.40, 188,450.70 and 115,427.80 is: 172,740.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,925.40 : 188,450.70 = 115,427.80 : x
  2. Step 2: Convert to fraction form
    125,925.40/188,450.70 = 115,427.80/x
  3. Step 3: Cross multiply
    125,925.40x = 188,450.70 × 115,427.80
  4. Step 4: Simplify right side
    125,925.40x = 21,752,449,709.46
  5. Step 5: Solve for x
    x = 21,752,449,709.46/125,925.40
  6. Step 6: Final answer
    x = 172,740.76

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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.