Home / 71,942.80-99,276.40-40,109.80

Finding the Fourth Proportional to 71,942.80, 99,276.40 and 40,109.80

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Solution

The fourth proportional to 71,942.80, 99,276.40 and 40,109.80 is: 55,348.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,942.80 : 99,276.40 = 40,109.80 : x
  2. Step 2: Convert to fraction form
    71,942.80/99,276.40 = 40,109.80/x
  3. Step 3: Cross multiply
    71,942.80x = 99,276.40 × 40,109.80
  4. Step 4: Simplify right side
    71,942.80x = 3,981,956,548.72
  5. Step 5: Solve for x
    x = 3,981,956,548.72/71,942.80
  6. Step 6: Final answer
    x = 55,348.92

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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.