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Finding the Fourth Proportional to 70,609.44, 97,441.70 and 38,779

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Solution

The fourth proportional to 70,609.44, 97,441.70 and 38,779 is: 53,515.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,609.44 : 97,441.70 = 38,779 : x
  2. Step 2: Convert to fraction form
    70,609.44/97,441.70 = 38,779/x
  3. Step 3: Cross multiply
    70,609.44x = 97,441.70 × 38,779
  4. Step 4: Simplify right side
    70,609.44x = 3,778,691,684.30
  5. Step 5: Solve for x
    x = 3,778,691,684.30/70,609.44
  6. Step 6: Final answer
    x = 53,515.39

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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.