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Finding the Fourth Proportional to 100,964.59, 139,332.11 and 55,644.23

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Solution

The fourth proportional to 100,964.59, 139,332.11 and 55,644.23 is: 76,789.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,964.59 : 139,332.11 = 55,644.23 : x
  2. Step 2: Convert to fraction form
    100,964.59/139,332.11 = 55,644.23/x
  3. Step 3: Cross multiply
    100,964.59x = 139,332.11 × 55,644.23
  4. Step 4: Simplify right side
    100,964.59x = 7,753,028,045.33
  5. Step 5: Solve for x
    x = 7,753,028,045.33/100,964.59
  6. Step 6: Final answer
    x = 76,789.58

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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.