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Finding the Fourth Proportional to 61,512.78, 84,887.65 and 33,218.47

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Solution

The fourth proportional to 61,512.78, 84,887.65 and 33,218.47 is: 45,841.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,512.78 : 84,887.65 = 33,218.47 : x
  2. Step 2: Convert to fraction form
    61,512.78/84,887.65 = 33,218.47/x
  3. Step 3: Cross multiply
    61,512.78x = 84,887.65 × 33,218.47
  4. Step 4: Simplify right side
    61,512.78x = 2,819,837,815.67
  5. Step 5: Solve for x
    x = 2,819,837,815.67/61,512.78
  6. Step 6: Final answer
    x = 45,841.49

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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.