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Finding the Fourth Proportional to 75,331.20, 112,996.80 and 66,874.80

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Solution

The fourth proportional to 75,331.20, 112,996.80 and 66,874.80 is: 100,312.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,331.20 : 112,996.80 = 66,874.80 : x
  2. Step 2: Convert to fraction form
    75,331.20/112,996.80 = 66,874.80/x
  3. Step 3: Cross multiply
    75,331.20x = 112,996.80 × 66,874.80
  4. Step 4: Simplify right side
    75,331.20x = 7,556,638,400.64
  5. Step 5: Solve for x
    x = 7,556,638,400.64/75,331.20
  6. Step 6: Final answer
    x = 100,312.20

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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.