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Finding the Fourth Proportional to 125,976.54, 188,520.99 and 78,613.92

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Solution

The fourth proportional to 125,976.54, 188,520.99 and 78,613.92 is: 117,643.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,976.54 : 188,520.99 = 78,613.92 : x
  2. Step 2: Convert to fraction form
    125,976.54/188,520.99 = 78,613.92/x
  3. Step 3: Cross multiply
    125,976.54x = 188,520.99 × 78,613.92
  4. Step 4: Simplify right side
    125,976.54x = 14,820,374,026.18
  5. Step 5: Solve for x
    x = 14,820,374,026.18/125,976.54
  6. Step 6: Final answer
    x = 117,643.92

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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.