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Finding the Fourth Proportional to 85,912.62, 118,560.05 and 47,672.31

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Solution

The fourth proportional to 85,912.62, 118,560.05 and 47,672.31 is: 65,788.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,912.62 : 118,560.05 = 47,672.31 : x
  2. Step 2: Convert to fraction form
    85,912.62/118,560.05 = 47,672.31/x
  3. Step 3: Cross multiply
    85,912.62x = 118,560.05 × 47,672.31
  4. Step 4: Simplify right side
    85,912.62x = 5,652,032,110.38
  5. Step 5: Solve for x
    x = 5,652,032,110.38/85,912.62
  6. Step 6: Final answer
    x = 65,788.15

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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.