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Finding the Fourth Proportional to 101,700.91, 140,350.77 and 61,406.65

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Solution

The fourth proportional to 101,700.91, 140,350.77 and 61,406.65 is: 84,743.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,700.91 : 140,350.77 = 61,406.65 : x
  2. Step 2: Convert to fraction form
    101,700.91/140,350.77 = 61,406.65/x
  3. Step 3: Cross multiply
    101,700.91x = 140,350.77 × 61,406.65
  4. Step 4: Simplify right side
    101,700.91x = 8,618,470,610.62
  5. Step 5: Solve for x
    x = 8,618,470,610.62/101,700.91
  6. Step 6: Final answer
    x = 84,743.30

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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.