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Finding the Fourth Proportional to 55,939.80, 84,006.90 and 54,190.20

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Solution

The fourth proportional to 55,939.80, 84,006.90 and 54,190.20 is: 81,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,939.80 : 84,006.90 = 54,190.20 : x
  2. Step 2: Convert to fraction form
    55,939.80/84,006.90 = 54,190.20/x
  3. Step 3: Cross multiply
    55,939.80x = 84,006.90 × 54,190.20
  4. Step 4: Simplify right side
    55,939.80x = 4,552,350,712.38
  5. Step 5: Solve for x
    x = 4,552,350,712.38/55,939.80
  6. Step 6: Final answer
    x = 81,379.46

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1.5x scale

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.