Home / 78,113.48-117,169.18-18,949.64

Finding the Fourth Proportional to 78,113.48, 117,169.18 and 18,949.64

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Solution

The fourth proportional to 78,113.48, 117,169.18 and 18,949.64 is: 28,424.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,113.48 : 117,169.18 = 18,949.64 : x
  2. Step 2: Convert to fraction form
    78,113.48/117,169.18 = 18,949.64/x
  3. Step 3: Cross multiply
    78,113.48x = 117,169.18 × 18,949.64
  4. Step 4: Simplify right side
    78,113.48x = 2,220,313,780.10
  5. Step 5: Solve for x
    x = 2,220,313,780.10/78,113.48
  6. Step 6: Final answer
    x = 28,424.21

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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.