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Finding the Fourth Proportional to 138,404.20, 207,606.30 and 131,492.20

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Solution

The fourth proportional to 138,404.20, 207,606.30 and 131,492.20 is: 197,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,404.20 : 207,606.30 = 131,492.20 : x
  2. Step 2: Convert to fraction form
    138,404.20/207,606.30 = 131,492.20/x
  3. Step 3: Cross multiply
    138,404.20x = 207,606.30 × 131,492.20
  4. Step 4: Simplify right side
    138,404.20x = 27,298,609,120.86
  5. Step 5: Solve for x
    x = 27,298,609,120.86/138,404.20
  6. Step 6: Final answer
    x = 197,238.30

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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.