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Finding the Fourth Proportional to 81,334.98, 121,790.27 and 65,453.26

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Solution

The fourth proportional to 81,334.98, 121,790.27 and 65,453.26 is: 98,009.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,334.98 : 121,790.27 = 65,453.26 : x
  2. Step 2: Convert to fraction form
    81,334.98/121,790.27 = 65,453.26/x
  3. Step 3: Cross multiply
    81,334.98x = 121,790.27 × 65,453.26
  4. Step 4: Simplify right side
    81,334.98x = 7,971,570,184.99
  5. Step 5: Solve for x
    x = 7,971,570,184.99/81,334.98
  6. Step 6: Final answer
    x = 98,009.12

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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.