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Finding the Fourth Proportional to 81,255.60, 121,834.80 and 41,889.60

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Solution

The fourth proportional to 81,255.60, 121,834.80 and 41,889.60 is: 62,809.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255.60 : 121,834.80 = 41,889.60 : x
  2. Step 2: Convert to fraction form
    81,255.60/121,834.80 = 41,889.60/x
  3. Step 3: Cross multiply
    81,255.60x = 121,834.80 × 41,889.60
  4. Step 4: Simplify right side
    81,255.60x = 5,103,611,038.08
  5. Step 5: Solve for x
    x = 5,103,611,038.08/81,255.60
  6. Step 6: Final answer
    x = 62,809.35

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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.