Home / 77,115.20-115,845.60-73,966.40

Finding the Fourth Proportional to 77,115.20, 115,845.60 and 73,966.40

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Solution

The fourth proportional to 77,115.20, 115,845.60 and 73,966.40 is: 111,115.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,115.20 : 115,845.60 = 73,966.40 : x
  2. Step 2: Convert to fraction form
    77,115.20/115,845.60 = 73,966.40/x
  3. Step 3: Cross multiply
    77,115.20x = 115,845.60 × 73,966.40
  4. Step 4: Simplify right side
    77,115.20x = 8,568,681,987.84
  5. Step 5: Solve for x
    x = 8,568,681,987.84/77,115.20
  6. Step 6: Final answer
    x = 111,115.34

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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.