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Finding the Fourth Proportional to 81,858.40, 122,672.40 and 60,632.80

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Solution

The fourth proportional to 81,858.40, 122,672.40 and 60,632.80 is: 90,863.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,858.40 : 122,672.40 = 60,632.80 : x
  2. Step 2: Convert to fraction form
    81,858.40/122,672.40 = 60,632.80/x
  3. Step 3: Cross multiply
    81,858.40x = 122,672.40 × 60,632.80
  4. Step 4: Simplify right side
    81,858.40x = 7,437,971,094.72
  5. Step 5: Solve for x
    x = 7,437,971,094.72/81,858.40
  6. Step 6: Final answer
    x = 90,863.87

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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.