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Finding the Fourth Proportional to 61,578.80, 84,978.78 and 33,284.54

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Solution

The fourth proportional to 61,578.80, 84,978.78 and 33,284.54 is: 45,932.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,578.80 : 84,978.78 = 33,284.54 : x
  2. Step 2: Convert to fraction form
    61,578.80/84,978.78 = 33,284.54/x
  3. Step 3: Cross multiply
    61,578.80x = 84,978.78 × 33,284.54
  4. Step 4: Simplify right side
    61,578.80x = 2,828,479,602.06
  5. Step 5: Solve for x
    x = 2,828,479,602.06/61,578.80
  6. Step 6: Final answer
    x = 45,932.68

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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.