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Finding the Fourth Proportional to 125,503.90, 188,129.49 and 55,370.86

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Solution

The fourth proportional to 125,503.90, 188,129.49 and 55,370.86 is: 83,000.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,503.90 : 188,129.49 = 55,370.86 : x
  2. Step 2: Convert to fraction form
    125,503.90/188,129.49 = 55,370.86/x
  3. Step 3: Cross multiply
    125,503.90x = 188,129.49 × 55,370.86
  4. Step 4: Simplify right side
    125,503.90x = 10,416,891,652.66
  5. Step 5: Solve for x
    x = 10,416,891,652.66/125,503.90
  6. Step 6: Final answer
    x = 83,000.54

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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.