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Finding the Fourth Proportional to 128,314.71, 192,462.84 and 39,558.96

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Solution

The fourth proportional to 128,314.71, 192,462.84 and 39,558.96 is: 59,335.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,314.71 : 192,462.84 = 39,558.96 : x
  2. Step 2: Convert to fraction form
    128,314.71/192,462.84 = 39,558.96/x
  3. Step 3: Cross multiply
    128,314.71x = 192,462.84 × 39,558.96
  4. Step 4: Simplify right side
    128,314.71x = 7,613,629,789.05
  5. Step 5: Solve for x
    x = 7,613,629,789.05/128,314.71
  6. Step 6: Final answer
    x = 59,335.60

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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.