Home / 78,815.10-118,049.85-68,447.10

Finding the Fourth Proportional to 78,815.10, 118,049.85 and 68,447.10

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Solution

The fourth proportional to 78,815.10, 118,049.85 and 68,447.10 is: 102,520.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,815.10 : 118,049.85 = 68,447.10 : x
  2. Step 2: Convert to fraction form
    78,815.10/118,049.85 = 68,447.10/x
  3. Step 3: Cross multiply
    78,815.10x = 118,049.85 × 68,447.10
  4. Step 4: Simplify right side
    78,815.10x = 8,080,169,887.94
  5. Step 5: Solve for x
    x = 8,080,169,887.94/78,815.10
  6. Step 6: Final answer
    x = 102,520.58

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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.