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Finding the Fourth Proportional to 101,871.31, 140,629.51 and 61,054.83

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Solution

The fourth proportional to 101,871.31, 140,629.51 and 61,054.83 is: 84,283.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,871.31 : 140,629.51 = 61,054.83 : x
  2. Step 2: Convert to fraction form
    101,871.31/140,629.51 = 61,054.83/x
  3. Step 3: Cross multiply
    101,871.31x = 140,629.51 × 61,054.83
  4. Step 4: Simplify right side
    101,871.31x = 8,586,110,826.03
  5. Step 5: Solve for x
    x = 8,586,110,826.03/101,871.31
  6. Step 6: Final answer
    x = 84,283.90

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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.