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Finding the Fourth Proportional to 50,728.68, 70,008.30 and 31,871.88

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Solution

The fourth proportional to 50,728.68, 70,008.30 and 31,871.88 is: 43,984.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,728.68 : 70,008.30 = 31,871.88 : x
  2. Step 2: Convert to fraction form
    50,728.68/70,008.30 = 31,871.88/x
  3. Step 3: Cross multiply
    50,728.68x = 70,008.30 × 31,871.88
  4. Step 4: Simplify right side
    50,728.68x = 2,231,296,136.60
  5. Step 5: Solve for x
    x = 2,231,296,136.60/50,728.68
  6. Step 6: Final answer
    x = 43,984.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.