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Finding the Fourth Proportional to 217,290,661.20, 325,935,991.80 and 166,272,325.20

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Solution

The fourth proportional to 217,290,661.20, 325,935,991.80 and 166,272,325.20 is: 249,408,487.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,290,661.20 : 325,935,991.80 = 166,272,325.20 : x
  2. Step 2: Convert to fraction form
    217,290,661.20/325,935,991.80 = 166,272,325.20/x
  3. Step 3: Cross multiply
    217,290,661.20x = 325,935,991.80 × 166,272,325.20
  4. Step 4: Simplify right side
    217,290,661.20x = 54,194,135,222,954,128
  5. Step 5: Solve for x
    x = 54,194,135,222,954,128/217,290,661.20
  6. Step 6: Final answer
    x = 249,408,487.80

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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.