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Finding the Fourth Proportional to 67,145.52, 100,720.52 and 20,398.26

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Solution

The fourth proportional to 67,145.52, 100,720.52 and 20,398.26 is: 30,598.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,145.52 : 100,720.52 = 20,398.26 : x
  2. Step 2: Convert to fraction form
    67,145.52/100,720.52 = 20,398.26/x
  3. Step 3: Cross multiply
    67,145.52x = 100,720.52 × 20,398.26
  4. Step 4: Simplify right side
    67,145.52x = 2,054,523,354.30
  5. Step 5: Solve for x
    x = 2,054,523,354.30/67,145.52
  6. Step 6: Final answer
    x = 30,598.07

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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.