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Finding the Fourth Proportional to 70,660.66, 105,991.59 and 20,741.58

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Solution

The fourth proportional to 70,660.66, 105,991.59 and 20,741.58 is: 31,112.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,660.66 : 105,991.59 = 20,741.58 : x
  2. Step 2: Convert to fraction form
    70,660.66/105,991.59 = 20,741.58/x
  3. Step 3: Cross multiply
    70,660.66x = 105,991.59 × 20,741.58
  4. Step 4: Simplify right side
    70,660.66x = 2,198,433,043.31
  5. Step 5: Solve for x
    x = 2,198,433,043.31/70,660.66
  6. Step 6: Final answer
    x = 31,112.55

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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.