Home / 216,172.43-298,305.90-120,685.28

Finding the Fourth Proportional to 216,172.43, 298,305.90 and 120,685.28

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Solution

The fourth proportional to 216,172.43, 298,305.90 and 120,685.28 is: 166,538.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,172.43 : 298,305.90 = 120,685.28 : x
  2. Step 2: Convert to fraction form
    216,172.43/298,305.90 = 120,685.28/x
  3. Step 3: Cross multiply
    216,172.43x = 298,305.90 × 120,685.28
  4. Step 4: Simplify right side
    216,172.43x = 36,001,131,067.15
  5. Step 5: Solve for x
    x = 36,001,131,067.15/216,172.43
  6. Step 6: Final answer
    x = 166,538.96

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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.