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Finding the Fourth Proportional to 138,683.92, 191,383.24 and 75,021.56

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Solution

The fourth proportional to 138,683.92, 191,383.24 and 75,021.56 is: 103,529.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,683.92 : 191,383.24 = 75,021.56 : x
  2. Step 2: Convert to fraction form
    138,683.92/191,383.24 = 75,021.56/x
  3. Step 3: Cross multiply
    138,683.92x = 191,383.24 × 75,021.56
  4. Step 4: Simplify right side
    138,683.92x = 14,357,869,222.65
  5. Step 5: Solve for x
    x = 14,357,869,222.65/138,683.92
  6. Step 6: Final answer
    x = 103,529.44

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1.5x scale

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.