Home / 76,839.11-115,258.67-20,679.35

Finding the Fourth Proportional to 76,839.11, 115,258.67 and 20,679.35

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Solution

The fourth proportional to 76,839.11, 115,258.67 and 20,679.35 is: 31,019.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,839.11 : 115,258.67 = 20,679.35 : x
  2. Step 2: Convert to fraction form
    76,839.11/115,258.67 = 20,679.35/x
  3. Step 3: Cross multiply
    76,839.11x = 115,258.67 × 20,679.35
  4. Step 4: Simplify right side
    76,839.11x = 2,383,473,852.87
  5. Step 5: Solve for x
    x = 2,383,473,852.87/76,839.11
  6. Step 6: Final answer
    x = 31,019.02

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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.