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Finding the Fourth Proportional to 243,610.80, 365,416.20 and 138,634.80

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Solution

The fourth proportional to 243,610.80, 365,416.20 and 138,634.80 is: 207,952.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,610.80 : 365,416.20 = 138,634.80 : x
  2. Step 2: Convert to fraction form
    243,610.80/365,416.20 = 138,634.80/x
  3. Step 3: Cross multiply
    243,610.80x = 365,416.20 × 138,634.80
  4. Step 4: Simplify right side
    243,610.80x = 50,659,401,803.76
  5. Step 5: Solve for x
    x = 50,659,401,803.76/243,610.80
  6. Step 6: Final answer
    x = 207,952.20

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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.