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Finding the Fourth Proportional to 61,153.63, 84,313.89 and 39,605.31

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Solution

The fourth proportional to 61,153.63, 84,313.89 and 39,605.31 is: 54,604.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,153.63 : 84,313.89 = 39,605.31 : x
  2. Step 2: Convert to fraction form
    61,153.63/84,313.89 = 39,605.31/x
  3. Step 3: Cross multiply
    61,153.63x = 84,313.89 × 39,605.31
  4. Step 4: Simplify right side
    61,153.63x = 3,339,277,750.76
  5. Step 5: Solve for x
    x = 3,339,277,750.76/61,153.63
  6. Step 6: Final answer
    x = 54,604.74

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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.