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Finding the Fourth Proportional to 70,224.94, 105,321.98 and 20,294.18

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Solution

The fourth proportional to 70,224.94, 105,321.98 and 20,294.18 is: 30,436.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,224.94 : 105,321.98 = 20,294.18 : x
  2. Step 2: Convert to fraction form
    70,224.94/105,321.98 = 20,294.18/x
  3. Step 3: Cross multiply
    70,224.94x = 105,321.98 × 20,294.18
  4. Step 4: Simplify right side
    70,224.94x = 2,137,423,220.08
  5. Step 5: Solve for x
    x = 2,137,423,220.08/70,224.94
  6. Step 6: Final answer
    x = 30,436.81

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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.