Home / 83,905.45-125,710.54-78,910.92

Finding the Fourth Proportional to 83,905.45, 125,710.54 and 78,910.92

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Solution

The fourth proportional to 83,905.45, 125,710.54 and 78,910.92 is: 118,227.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,905.45 : 125,710.54 = 78,910.92 : x
  2. Step 2: Convert to fraction form
    83,905.45/125,710.54 = 78,910.92/x
  3. Step 3: Cross multiply
    83,905.45x = 125,710.54 × 78,910.92
  4. Step 4: Simplify right side
    83,905.45x = 9,919,934,365.10
  5. Step 5: Solve for x
    x = 9,919,934,365.10/83,905.45
  6. Step 6: Final answer
    x = 118,227.53

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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.