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Finding the Fourth Proportional to 79,284.84, 118,926.96 and 20,120.28

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Solution

The fourth proportional to 79,284.84, 118,926.96 and 20,120.28 is: 30,180.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,284.84 : 118,926.96 = 20,120.28 : x
  2. Step 2: Convert to fraction form
    79,284.84/118,926.96 = 20,120.28/x
  3. Step 3: Cross multiply
    79,284.84x = 118,926.96 × 20,120.28
  4. Step 4: Simplify right side
    79,284.84x = 2,392,843,734.75
  5. Step 5: Solve for x
    x = 2,392,843,734.75/79,284.84
  6. Step 6: Final answer
    x = 30,180.34

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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.