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Finding the Fourth Proportional to 70,321.24, 105,468.42 and 21,073.24

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Solution

The fourth proportional to 70,321.24, 105,468.42 and 21,073.24 is: 31,605.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,321.24 : 105,468.42 = 21,073.24 : x
  2. Step 2: Convert to fraction form
    70,321.24/105,468.42 = 21,073.24/x
  3. Step 3: Cross multiply
    70,321.24x = 105,468.42 × 21,073.24
  4. Step 4: Simplify right side
    70,321.24x = 2,222,561,327.08
  5. Step 5: Solve for x
    x = 2,222,561,327.08/70,321.24
  6. Step 6: Final answer
    x = 31,605.83

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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.