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Finding the Fourth Proportional to 70,111.26, 105,166.90 and 20,863.26

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Solution

The fourth proportional to 70,111.26, 105,166.90 and 20,863.26 is: 31,294.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,111.26 : 105,166.90 = 20,863.26 : x
  2. Step 2: Convert to fraction form
    70,111.26/105,166.90 = 20,863.26/x
  3. Step 3: Cross multiply
    70,111.26x = 105,166.90 × 20,863.26
  4. Step 4: Simplify right side
    70,111.26x = 2,194,124,378.09
  5. Step 5: Solve for x
    x = 2,194,124,378.09/70,111.26
  6. Step 6: Final answer
    x = 31,294.89

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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.