Home / 84,648.84-126,355.20-78,481.50

Finding the Fourth Proportional to 84,648.84, 126,355.20 and 78,481.50

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Solution

The fourth proportional to 84,648.84, 126,355.20 and 78,481.50 is: 117,149.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,648.84 : 126,355.20 = 78,481.50 : x
  2. Step 2: Convert to fraction form
    84,648.84/126,355.20 = 78,481.50/x
  3. Step 3: Cross multiply
    84,648.84x = 126,355.20 × 78,481.50
  4. Step 4: Simplify right side
    84,648.84x = 9,916,545,628.80
  5. Step 5: Solve for x
    x = 9,916,545,628.80/84,648.84
  6. Step 6: Final answer
    x = 117,149.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.