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Finding the Fourth Proportional to 57,471,985.80, 86,207,978.70 and 55,204,504.20

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Solution

The fourth proportional to 57,471,985.80, 86,207,978.70 and 55,204,504.20 is: 82,806,756.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,471,985.80 : 86,207,978.70 = 55,204,504.20 : x
  2. Step 2: Convert to fraction form
    57,471,985.80/86,207,978.70 = 55,204,504.20/x
  3. Step 3: Cross multiply
    57,471,985.80x = 86,207,978.70 × 55,204,504.20
  4. Step 4: Simplify right side
    57,471,985.80x = 4,759,068,722,217,661
  5. Step 5: Solve for x
    x = 4,759,068,722,217,661/57,471,985.80
  6. Step 6: Final answer
    x = 82,806,756.30

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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.