Home / 55,003.21-75,902.13-31,131.20

Finding the Fourth Proportional to 55,003.21, 75,902.13 and 31,131.20

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Solution

The fourth proportional to 55,003.21, 75,902.13 and 31,131.20 is: 42,959.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,003.21 : 75,902.13 = 31,131.20 : x
  2. Step 2: Convert to fraction form
    55,003.21/75,902.13 = 31,131.20/x
  3. Step 3: Cross multiply
    55,003.21x = 75,902.13 × 31,131.20
  4. Step 4: Simplify right side
    55,003.21x = 2,362,924,579.21
  5. Step 5: Solve for x
    x = 2,362,924,579.21/55,003.21
  6. Step 6: Final answer
    x = 42,959.76

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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.