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Finding the Fourth Proportional to 101,781.21, 140,328.92 and 72,744.23

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Solution

The fourth proportional to 101,781.21, 140,328.92 and 72,744.23 is: 100,294.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,781.21 : 140,328.92 = 72,744.23 : x
  2. Step 2: Convert to fraction form
    101,781.21/140,328.92 = 72,744.23/x
  3. Step 3: Cross multiply
    101,781.21x = 140,328.92 × 72,744.23
  4. Step 4: Simplify right side
    101,781.21x = 10,208,119,764.81
  5. Step 5: Solve for x
    x = 10,208,119,764.81/101,781.21
  6. Step 6: Final answer
    x = 100,294.73

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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.