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Finding the Fourth Proportional to 128,009.68, 192,046.94 and 39,267.72

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Solution

The fourth proportional to 128,009.68, 192,046.94 and 39,267.72 is: 58,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,009.68 : 192,046.94 = 39,267.72 : x
  2. Step 2: Convert to fraction form
    128,009.68/192,046.94 = 39,267.72/x
  3. Step 3: Cross multiply
    128,009.68x = 192,046.94 × 39,267.72
  4. Step 4: Simplify right side
    128,009.68x = 7,541,245,466.78
  5. Step 5: Solve for x
    x = 7,541,245,466.78/128,009.68
  6. Step 6: Final answer
    x = 58,911.53

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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.