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Finding the Fourth Proportional to 61,139.43, 84,373.31 and 35,645.09

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Solution

The fourth proportional to 61,139.43, 84,373.31 and 35,645.09 is: 49,190.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,139.43 : 84,373.31 = 35,645.09 : x
  2. Step 2: Convert to fraction form
    61,139.43/84,373.31 = 35,645.09/x
  3. Step 3: Cross multiply
    61,139.43x = 84,373.31 × 35,645.09
  4. Step 4: Simplify right side
    61,139.43x = 3,007,493,895.79
  5. Step 5: Solve for x
    x = 3,007,493,895.79/61,139.43
  6. Step 6: Final answer
    x = 49,190.74

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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.