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Finding the Fourth Proportional to 119,390.37, 164,759.09 and 65,679.47

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Solution

The fourth proportional to 119,390.37, 164,759.09 and 65,679.47 is: 90,637.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,390.37 : 164,759.09 = 65,679.47 : x
  2. Step 2: Convert to fraction form
    119,390.37/164,759.09 = 65,679.47/x
  3. Step 3: Cross multiply
    119,390.37x = 164,759.09 × 65,679.47
  4. Step 4: Simplify right side
    119,390.37x = 10,821,289,708.88
  5. Step 5: Solve for x
    x = 10,821,289,708.88/119,390.37
  6. Step 6: Final answer
    x = 90,637.88

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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.