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Finding the Fourth Proportional to 101,640.64, 140,269.30 and 61,353.88

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Solution

The fourth proportional to 101,640.64, 140,269.30 and 61,353.88 is: 84,671.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,640.64 : 140,269.30 = 61,353.88 : x
  2. Step 2: Convert to fraction form
    101,640.64/140,269.30 = 61,353.88/x
  3. Step 3: Cross multiply
    101,640.64x = 140,269.30 × 61,353.88
  4. Step 4: Simplify right side
    101,640.64x = 8,606,065,799.88
  5. Step 5: Solve for x
    x = 8,606,065,799.88/101,640.64
  6. Step 6: Final answer
    x = 84,671.50

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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.