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Finding the Fourth Proportional to 101,910.79, 140,649.86 and 61,624.85

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Solution

The fourth proportional to 101,910.79, 140,649.86 and 61,624.85 is: 85,050.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,910.79 : 140,649.86 = 61,624.85 : x
  2. Step 2: Convert to fraction form
    101,910.79/140,649.86 = 61,624.85/x
  3. Step 3: Cross multiply
    101,910.79x = 140,649.86 × 61,624.85
  4. Step 4: Simplify right side
    101,910.79x = 8,667,525,975.83
  5. Step 5: Solve for x
    x = 8,667,525,975.83/101,910.79
  6. Step 6: Final answer
    x = 85,050.13

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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.