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Finding the Fourth Proportional to 55,390.86, 82,991.76 and 30,451.80

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Solution

The fourth proportional to 55,390.86, 82,991.76 and 30,451.80 is: 45,625.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,390.86 : 82,991.76 = 30,451.80 : x
  2. Step 2: Convert to fraction form
    55,390.86/82,991.76 = 30,451.80/x
  3. Step 3: Cross multiply
    55,390.86x = 82,991.76 × 30,451.80
  4. Step 4: Simplify right side
    55,390.86x = 2,527,248,477.17
  5. Step 5: Solve for x
    x = 2,527,248,477.17/55,390.86
  6. Step 6: Final answer
    x = 45,625.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.