Home / 78,282.12-117,412.12-25,684.80

Finding the Fourth Proportional to 78,282.12, 117,412.12 and 25,684.80

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Solution

The fourth proportional to 78,282.12, 117,412.12 and 25,684.80 is: 38,523.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,282.12 : 117,412.12 = 25,684.80 : x
  2. Step 2: Convert to fraction form
    78,282.12/117,412.12 = 25,684.80/x
  3. Step 3: Cross multiply
    78,282.12x = 117,412.12 × 25,684.80
  4. Step 4: Simplify right side
    78,282.12x = 3,015,706,819.78
  5. Step 5: Solve for x
    x = 3,015,706,819.78/78,282.12
  6. Step 6: Final answer
    x = 38,523.57

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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.