Home / 78,105.15-117,078.83-30,753.47

Finding the Fourth Proportional to 78,105.15, 117,078.83 and 30,753.47

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Solution

The fourth proportional to 78,105.15, 117,078.83 and 30,753.47 is: 46,099.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,105.15 : 117,078.83 = 30,753.47 : x
  2. Step 2: Convert to fraction form
    78,105.15/117,078.83 = 30,753.47/x
  3. Step 3: Cross multiply
    78,105.15x = 117,078.83 × 30,753.47
  4. Step 4: Simplify right side
    78,105.15x = 3,600,579,700.65
  5. Step 5: Solve for x
    x = 3,600,579,700.65/78,105.15
  6. Step 6: Final answer
    x = 46,099.13

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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.