Home / 78,516.16-117,708.01-34,109.75

Finding the Fourth Proportional to 78,516.16, 117,708.01 and 34,109.75

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Solution

The fourth proportional to 78,516.16, 117,708.01 and 34,109.75 is: 51,135.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,516.16 : 117,708.01 = 34,109.75 : x
  2. Step 2: Convert to fraction form
    78,516.16/117,708.01 = 34,109.75/x
  3. Step 3: Cross multiply
    78,516.16x = 117,708.01 × 34,109.75
  4. Step 4: Simplify right side
    78,516.16x = 4,014,990,794.10
  5. Step 5: Solve for x
    x = 4,014,990,794.10/78,516.16
  6. Step 6: Final answer
    x = 51,135.85

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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.