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Finding the Fourth Proportional to 109,129.88, 150,597.69 and 61,383.21

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Solution

The fourth proportional to 109,129.88, 150,597.69 and 61,383.21 is: 84,707.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,129.88 : 150,597.69 = 61,383.21 : x
  2. Step 2: Convert to fraction form
    109,129.88/150,597.69 = 61,383.21/x
  3. Step 3: Cross multiply
    109,129.88x = 150,597.69 × 61,383.21
  4. Step 4: Simplify right side
    109,129.88x = 9,244,169,855.61
  5. Step 5: Solve for x
    x = 9,244,169,855.61/109,129.88
  6. Step 6: Final answer
    x = 84,707.97

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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.