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Finding the Fourth Proportional to 128,491.11, 192,805.92 and 61,007.58

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Solution

The fourth proportional to 128,491.11, 192,805.92 and 61,007.58 is: 91,544.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,491.11 : 192,805.92 = 61,007.58 : x
  2. Step 2: Convert to fraction form
    128,491.11/192,805.92 = 61,007.58/x
  3. Step 3: Cross multiply
    128,491.11x = 192,805.92 × 61,007.58
  4. Step 4: Simplify right side
    128,491.11x = 11,762,622,588.87
  5. Step 5: Solve for x
    x = 11,762,622,588.87/128,491.11
  6. Step 6: Final answer
    x = 91,544.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.