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Finding the Fourth Proportional to 61,034.93, 91,561.05 and 18,918.33

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Solution

The fourth proportional to 61,034.93, 91,561.05 and 18,918.33 is: 28,380.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,034.93 : 91,561.05 = 18,918.33 : x
  2. Step 2: Convert to fraction form
    61,034.93/91,561.05 = 18,918.33/x
  3. Step 3: Cross multiply
    61,034.93x = 91,561.05 × 18,918.33
  4. Step 4: Simplify right side
    61,034.93x = 1,732,181,815.69
  5. Step 5: Solve for x
    x = 1,732,181,815.69/61,034.93
  6. Step 6: Final answer
    x = 28,380.17

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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.