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Finding the Fourth Proportional to 81,396.90, 112,314.60 and 45,586.80

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Solution

The fourth proportional to 81,396.90, 112,314.60 and 45,586.80 is: 62,902.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,396.90 : 112,314.60 = 45,586.80 : x
  2. Step 2: Convert to fraction form
    81,396.90/112,314.60 = 45,586.80/x
  3. Step 3: Cross multiply
    81,396.90x = 112,314.60 × 45,586.80
  4. Step 4: Simplify right side
    81,396.90x = 5,120,063,207.28
  5. Step 5: Solve for x
    x = 5,120,063,207.28/81,396.90
  6. Step 6: Final answer
    x = 62,902.43

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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.