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Finding the Fourth Proportional to 43,720,993.80, 65,581,490.70 and 18,148,840.20

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Solution

The fourth proportional to 43,720,993.80, 65,581,490.70 and 18,148,840.20 is: 27,223,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,720,993.80 : 65,581,490.70 = 18,148,840.20 : x
  2. Step 2: Convert to fraction form
    43,720,993.80/65,581,490.70 = 18,148,840.20/x
  3. Step 3: Cross multiply
    43,720,993.80x = 65,581,490.70 × 18,148,840.20
  4. Step 4: Simplify right side
    43,720,993.80x = 1,190,227,994,792,086.25
  5. Step 5: Solve for x
    x = 1,190,227,994,792,086.25/43,720,993.80
  6. Step 6: Final answer
    x = 27,223,260.30

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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.