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Finding the Fourth Proportional to 65,549.90, 98,334.58 and 21,161.90

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Solution

The fourth proportional to 65,549.90, 98,334.58 and 21,161.90 is: 31,745.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,549.90 : 98,334.58 = 21,161.90 : x
  2. Step 2: Convert to fraction form
    65,549.90/98,334.58 = 21,161.90/x
  3. Step 3: Cross multiply
    65,549.90x = 98,334.58 × 21,161.90
  4. Step 4: Simplify right side
    65,549.90x = 2,080,946,548.50
  5. Step 5: Solve for x
    x = 2,080,946,548.50/65,549.90
  6. Step 6: Final answer
    x = 31,745.99

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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.