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Finding the Fourth Proportional to 70,472.56, 105,698.58 and 20,539.25

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Solution

The fourth proportional to 70,472.56, 105,698.58 and 20,539.25 is: 30,805.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,472.56 : 105,698.58 = 20,539.25 : x
  2. Step 2: Convert to fraction form
    70,472.56/105,698.58 = 20,539.25/x
  3. Step 3: Cross multiply
    70,472.56x = 105,698.58 × 20,539.25
  4. Step 4: Simplify right side
    70,472.56x = 2,170,969,197.26
  5. Step 5: Solve for x
    x = 2,170,969,197.26/70,472.56
  6. Step 6: Final answer
    x = 30,805.88

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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.