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Finding the Fourth Proportional to 45,967.48, 68,916.12 and 20,990.19

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Solution

The fourth proportional to 45,967.48, 68,916.12 and 20,990.19 is: 31,469.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,967.48 : 68,916.12 = 20,990.19 : x
  2. Step 2: Convert to fraction form
    45,967.48/68,916.12 = 20,990.19/x
  3. Step 3: Cross multiply
    45,967.48x = 68,916.12 × 20,990.19
  4. Step 4: Simplify right side
    45,967.48x = 1,446,562,452.86
  5. Step 5: Solve for x
    x = 1,446,562,452.86/45,967.48
  6. Step 6: Final answer
    x = 31,469.26

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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.