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Finding the Fourth Proportional to 210,143,086.39, 289,978,374.58 and 117,306,511.03

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Solution

The fourth proportional to 210,143,086.39, 289,978,374.58 and 117,306,511.03 is: 161,872,331.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,143,086.39 : 289,978,374.58 = 117,306,511.03 : x
  2. Step 2: Convert to fraction form
    210,143,086.39/289,978,374.58 = 117,306,511.03/x
  3. Step 3: Cross multiply
    210,143,086.39x = 289,978,374.58 × 117,306,511.03
  4. Step 4: Simplify right side
    210,143,086.39x = 34,016,351,396,858,708
  5. Step 5: Solve for x
    x = 34,016,351,396,858,708/210,143,086.39
  6. Step 6: Final answer
    x = 161,872,331.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.