Home / 78,990.34-118,481.86-19,824.70

Finding the Fourth Proportional to 78,990.34, 118,481.86 and 19,824.70

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Solution

The fourth proportional to 78,990.34, 118,481.86 and 19,824.70 is: 29,736.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,990.34 : 118,481.86 = 19,824.70 : x
  2. Step 2: Convert to fraction form
    78,990.34/118,481.86 = 19,824.70/x
  3. Step 3: Cross multiply
    78,990.34x = 118,481.86 × 19,824.70
  4. Step 4: Simplify right side
    78,990.34x = 2,348,867,329.94
  5. Step 5: Solve for x
    x = 2,348,867,329.94/78,990.34
  6. Step 6: Final answer
    x = 29,736.13

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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.