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Finding the Fourth Proportional to 72,789.87, 100,448.96 and 40,956.27

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Solution

The fourth proportional to 72,789.87, 100,448.96 and 40,956.27 is: 56,519.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,789.87 : 100,448.96 = 40,956.27 : x
  2. Step 2: Convert to fraction form
    72,789.87/100,448.96 = 40,956.27/x
  3. Step 3: Cross multiply
    72,789.87x = 100,448.96 × 40,956.27
  4. Step 4: Simplify right side
    72,789.87x = 4,114,014,522.20
  5. Step 5: Solve for x
    x = 4,114,014,522.20/72,789.87
  6. Step 6: Final answer
    x = 56,519.05

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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.