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Finding the Fourth Proportional to 100,364.56, 138,502.87 and 57,923.09

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Solution

The fourth proportional to 100,364.56, 138,502.87 and 57,923.09 is: 79,933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,364.56 : 138,502.87 = 57,923.09 : x
  2. Step 2: Convert to fraction form
    100,364.56/138,502.87 = 57,923.09/x
  3. Step 3: Cross multiply
    100,364.56x = 138,502.87 × 57,923.09
  4. Step 4: Simplify right side
    100,364.56x = 8,022,514,204.27
  5. Step 5: Solve for x
    x = 8,022,514,204.27/100,364.56
  6. Step 6: Final answer
    x = 79,933.74

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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.