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Finding the Fourth Proportional to 126,884.50, 175,021.43 and 81,621.50

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Solution

The fourth proportional to 126,884.50, 175,021.43 and 81,621.50 is: 112,586.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,884.50 : 175,021.43 = 81,621.50 : x
  2. Step 2: Convert to fraction form
    126,884.50/175,021.43 = 81,621.50/x
  3. Step 3: Cross multiply
    126,884.50x = 175,021.43 × 81,621.50
  4. Step 4: Simplify right side
    126,884.50x = 14,285,510,365.53
  5. Step 5: Solve for x
    x = 14,285,510,365.53/126,884.50
  6. Step 6: Final answer
    x = 112,586.73

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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.