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Finding the Fourth Proportional to 125,881.92, 188,809.44 and 78,995.52

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Solution

The fourth proportional to 125,881.92, 188,809.44 and 78,995.52 is: 118,484.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,881.92 : 188,809.44 = 78,995.52 : x
  2. Step 2: Convert to fraction form
    125,881.92/188,809.44 = 78,995.52/x
  3. Step 3: Cross multiply
    125,881.92x = 188,809.44 × 78,995.52
  4. Step 4: Simplify right side
    125,881.92x = 14,915,099,893.71
  5. Step 5: Solve for x
    x = 14,915,099,893.71/125,881.92
  6. Step 6: Final answer
    x = 118,484.85

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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.