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Finding the Fourth Proportional to 70,511.74, 97,305.67 and 38,680.42

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Solution

The fourth proportional to 70,511.74, 97,305.67 and 38,680.42 is: 53,378.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,511.74 : 97,305.67 = 38,680.42 : x
  2. Step 2: Convert to fraction form
    70,511.74/97,305.67 = 38,680.42/x
  3. Step 3: Cross multiply
    70,511.74x = 97,305.67 × 38,680.42
  4. Step 4: Simplify right side
    70,511.74x = 3,763,824,183.98
  5. Step 5: Solve for x
    x = 3,763,824,183.98/70,511.74
  6. Step 6: Final answer
    x = 53,378.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.