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Finding the Fourth Proportional to 70,759.85, 97,648.59 and 38,928.06

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Solution

The fourth proportional to 70,759.85, 97,648.59 and 38,928.06 is: 53,720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,759.85 : 97,648.59 = 38,928.06 : x
  2. Step 2: Convert to fraction form
    70,759.85/97,648.59 = 38,928.06/x
  3. Step 3: Cross multiply
    70,759.85x = 97,648.59 × 38,928.06
  4. Step 4: Simplify right side
    70,759.85x = 3,801,269,975.80
  5. Step 5: Solve for x
    x = 3,801,269,975.80/70,759.85
  6. Step 6: Final answer
    x = 53,720.72

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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.