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Finding the Fourth Proportional to 70,545.27, 105,827.84 and 20,629.13

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Solution

The fourth proportional to 70,545.27, 105,827.84 and 20,629.13 is: 30,946.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,545.27 : 105,827.84 = 20,629.13 : x
  2. Step 2: Convert to fraction form
    70,545.27/105,827.84 = 20,629.13/x
  3. Step 3: Cross multiply
    70,545.27x = 105,827.84 × 20,629.13
  4. Step 4: Simplify right side
    70,545.27x = 2,183,135,714.05
  5. Step 5: Solve for x
    x = 2,183,135,714.05/70,545.27
  6. Step 6: Final answer
    x = 30,946.59

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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.