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Finding the Fourth Proportional to 101,806.97, 140,490.16 and 61,513.61

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Solution

The fourth proportional to 101,806.97, 140,490.16 and 61,513.61 is: 84,886.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,806.97 : 140,490.16 = 61,513.61 : x
  2. Step 2: Convert to fraction form
    101,806.97/140,490.16 = 61,513.61/x
  3. Step 3: Cross multiply
    101,806.97x = 140,490.16 × 61,513.61
  4. Step 4: Simplify right side
    101,806.97x = 8,642,056,054.84
  5. Step 5: Solve for x
    x = 8,642,056,054.84/101,806.97
  6. Step 6: Final answer
    x = 84,886.69

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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.