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Finding the Fourth Proportional to 81,239.60, 121,810.80 and 41,873.60

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Solution

The fourth proportional to 81,239.60, 121,810.80 and 41,873.60 is: 62,785.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,239.60 : 121,810.80 = 41,873.60 : x
  2. Step 2: Convert to fraction form
    81,239.60/121,810.80 = 41,873.60/x
  3. Step 3: Cross multiply
    81,239.60x = 121,810.80 × 41,873.60
  4. Step 4: Simplify right side
    81,239.60x = 5,100,656,714.88
  5. Step 5: Solve for x
    x = 5,100,656,714.88/81,239.60
  6. Step 6: Final answer
    x = 62,785.35

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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.