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Finding the Fourth Proportional to 100,393.50, 138,540.54 and 57,370.26

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Solution

The fourth proportional to 100,393.50, 138,540.54 and 57,370.26 is: 79,169.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,393.50 : 138,540.54 = 57,370.26 : x
  2. Step 2: Convert to fraction form
    100,393.50/138,540.54 = 57,370.26/x
  3. Step 3: Cross multiply
    100,393.50x = 138,540.54 × 57,370.26
  4. Step 4: Simplify right side
    100,393.50x = 7,948,106,800.34
  5. Step 5: Solve for x
    x = 7,948,106,800.34/100,393.50
  6. Step 6: Final answer
    x = 79,169.54

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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.