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Finding the Fourth Proportional to 81,853.40, 122,664.90 and 60,627.80

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Solution

The fourth proportional to 81,853.40, 122,664.90 and 60,627.80 is: 90,856.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,853.40 : 122,664.90 = 60,627.80 : x
  2. Step 2: Convert to fraction form
    81,853.40/122,664.90 = 60,627.80/x
  3. Step 3: Cross multiply
    81,853.40x = 122,664.90 × 60,627.80
  4. Step 4: Simplify right side
    81,853.40x = 7,436,903,024.22
  5. Step 5: Solve for x
    x = 7,436,903,024.22/81,853.40
  6. Step 6: Final answer
    x = 90,856.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.