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Finding the Fourth Proportional to 70,663.53, 105,995.90 and 20,744.45

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Solution

The fourth proportional to 70,663.53, 105,995.90 and 20,744.45 is: 31,116.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,663.53 : 105,995.90 = 20,744.45 : x
  2. Step 2: Convert to fraction form
    70,663.53/105,995.90 = 20,744.45/x
  3. Step 3: Cross multiply
    70,663.53x = 105,995.90 × 20,744.45
  4. Step 4: Simplify right side
    70,663.53x = 2,198,826,169.64
  5. Step 5: Solve for x
    x = 2,198,826,169.64/70,663.53
  6. Step 6: Final answer
    x = 31,116.85

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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.