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Finding the Fourth Proportional to 125,857.90, 188,786.85 and 123,670.90

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Solution

The fourth proportional to 125,857.90, 188,786.85 and 123,670.90 is: 185,506.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,857.90 : 188,786.85 = 123,670.90 : x
  2. Step 2: Convert to fraction form
    125,857.90/188,786.85 = 123,670.90/x
  3. Step 3: Cross multiply
    125,857.90x = 188,786.85 × 123,670.90
  4. Step 4: Simplify right side
    125,857.90x = 23,347,439,647.67
  5. Step 5: Solve for x
    x = 23,347,439,647.67/125,857.90
  6. Step 6: Final answer
    x = 185,506.35

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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.