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Finding the Fourth Proportional to 125,751.72, 188,455.80 and 69,508.56

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Solution

The fourth proportional to 125,751.72, 188,455.80 and 69,508.56 is: 104,167.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,751.72 : 188,455.80 = 69,508.56 : x
  2. Step 2: Convert to fraction form
    125,751.72/188,455.80 = 69,508.56/x
  3. Step 3: Cross multiply
    125,751.72x = 188,455.80 × 69,508.56
  4. Step 4: Simplify right side
    125,751.72x = 13,099,291,281.65
  5. Step 5: Solve for x
    x = 13,099,291,281.65/125,751.72
  6. Step 6: Final answer
    x = 104,167.89

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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.