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Finding the Fourth Proportional to 72,471.12, 100,011.18 and 43,786.80

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Solution

The fourth proportional to 72,471.12, 100,011.18 and 43,786.80 is: 60,426.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,471.12 : 100,011.18 = 43,786.80 : x
  2. Step 2: Convert to fraction form
    72,471.12/100,011.18 = 43,786.80/x
  3. Step 3: Cross multiply
    72,471.12x = 100,011.18 × 43,786.80
  4. Step 4: Simplify right side
    72,471.12x = 4,379,169,536.42
  5. Step 5: Solve for x
    x = 4,379,169,536.42/72,471.12
  6. Step 6: Final answer
    x = 60,426.41

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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.