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Finding the Fourth Proportional to 85,679.34, 118,241.18 and 47,438.89

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Solution

The fourth proportional to 85,679.34, 118,241.18 and 47,438.89 is: 65,467.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,679.34 : 118,241.18 = 47,438.89 : x
  2. Step 2: Convert to fraction form
    85,679.34/118,241.18 = 47,438.89/x
  3. Step 3: Cross multiply
    85,679.34x = 118,241.18 × 47,438.89
  4. Step 4: Simplify right side
    85,679.34x = 5,609,230,331.49
  5. Step 5: Solve for x
    x = 5,609,230,331.49/85,679.34
  6. Step 6: Final answer
    x = 65,467.71

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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.