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Finding the Fourth Proportional to 243,698.55, 365,687.55 and 131,378.28

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Solution

The fourth proportional to 243,698.55, 365,687.55 and 131,378.28 is: 197,142.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,698.55 : 365,687.55 = 131,378.28 : x
  2. Step 2: Convert to fraction form
    243,698.55/365,687.55 = 131,378.28/x
  3. Step 3: Cross multiply
    243,698.55x = 365,687.55 × 131,378.28
  4. Step 4: Simplify right side
    243,698.55x = 48,043,401,336.41
  5. Step 5: Solve for x
    x = 48,043,401,336.41/243,698.55
  6. Step 6: Final answer
    x = 197,142.75

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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.