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Finding the Fourth Proportional to 55,057.89, 75,980.89 and 31,189.52

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Solution

The fourth proportional to 55,057.89, 75,980.89 and 31,189.52 is: 43,042.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,057.89 : 75,980.89 = 31,189.52 : x
  2. Step 2: Convert to fraction form
    55,057.89/75,980.89 = 31,189.52/x
  3. Step 3: Cross multiply
    55,057.89x = 75,980.89 × 31,189.52
  4. Step 4: Simplify right side
    55,057.89x = 2,369,807,488.27
  5. Step 5: Solve for x
    x = 2,369,807,488.27/55,057.89
  6. Step 6: Final answer
    x = 43,042.11

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