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Finding the Fourth Proportional to 393,661,693.80, 590,492,540.70 and 121,032,023.40

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Solution

The fourth proportional to 393,661,693.80, 590,492,540.70 and 121,032,023.40 is: 181,548,035.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,661,693.80 : 590,492,540.70 = 121,032,023.40 : x
  2. Step 2: Convert to fraction form
    393,661,693.80/590,492,540.70 = 121,032,023.40/x
  3. Step 3: Cross multiply
    393,661,693.80x = 590,492,540.70 × 121,032,023.40
  4. Step 4: Simplify right side
    393,661,693.80x = 71,468,507,003,527,864
  5. Step 5: Solve for x
    x = 71,468,507,003,527,864/393,661,693.80
  6. Step 6: Final answer
    x = 181,548,035.10

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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.