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Finding the Fourth Proportional to 81,277.60, 121,867.80 and 41,911.60

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Solution

The fourth proportional to 81,277.60, 121,867.80 and 41,911.60 is: 62,842.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,277.60 : 121,867.80 = 41,911.60 : x
  2. Step 2: Convert to fraction form
    81,277.60/121,867.80 = 41,911.60/x
  3. Step 3: Cross multiply
    81,277.60x = 121,867.80 × 41,911.60
  4. Step 4: Simplify right side
    81,277.60x = 5,107,674,486.48
  5. Step 5: Solve for x
    x = 5,107,674,486.48/81,277.60
  6. Step 6: Final answer
    x = 62,842.34

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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.