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Finding the Fourth Proportional to 70,720.84, 106,073.34 and 18,131.56

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Solution

The fourth proportional to 70,720.84, 106,073.34 and 18,131.56 is: 27,195.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,720.84 : 106,073.34 = 18,131.56 : x
  2. Step 2: Convert to fraction form
    70,720.84/106,073.34 = 18,131.56/x
  3. Step 3: Cross multiply
    70,720.84x = 106,073.34 × 18,131.56
  4. Step 4: Simplify right side
    70,720.84x = 1,923,275,128.61
  5. Step 5: Solve for x
    x = 1,923,275,128.61/70,720.84
  6. Step 6: Final answer
    x = 27,195.31

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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.