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Finding the Fourth Proportional to 101,991.35, 140,754.71 and 61,706.81

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Solution

The fourth proportional to 101,991.35, 140,754.71 and 61,706.81 is: 85,159.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,991.35 : 140,754.71 = 61,706.81 : x
  2. Step 2: Convert to fraction form
    101,991.35/140,754.71 = 61,706.81/x
  3. Step 3: Cross multiply
    101,991.35x = 140,754.71 × 61,706.81
  4. Step 4: Simplify right side
    101,991.35x = 8,685,524,652.73
  5. Step 5: Solve for x
    x = 8,685,524,652.73/101,991.35
  6. Step 6: Final answer
    x = 85,159.42

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1.5x scale

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.