Home / 78,078.16-117,233.88-76,911.76

Finding the Fourth Proportional to 78,078.16, 117,233.88 and 76,911.76

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Solution

The fourth proportional to 78,078.16, 117,233.88 and 76,911.76 is: 115,482.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,078.16 : 117,233.88 = 76,911.76 : x
  2. Step 2: Convert to fraction form
    78,078.16/117,233.88 = 76,911.76/x
  3. Step 3: Cross multiply
    78,078.16x = 117,233.88 × 76,911.76
  4. Step 4: Simplify right side
    78,078.16x = 9,016,664,042.43
  5. Step 5: Solve for x
    x = 9,016,664,042.43/78,078.16
  6. Step 6: Final answer
    x = 115,482.54

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1.5x scale

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.