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Finding the Fourth Proportional to 65,491.60, 98,251.80 and 21,110.80

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Solution

The fourth proportional to 65,491.60, 98,251.80 and 21,110.80 is: 31,670.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,491.60 : 98,251.80 = 21,110.80 : x
  2. Step 2: Convert to fraction form
    65,491.60/98,251.80 = 21,110.80/x
  3. Step 3: Cross multiply
    65,491.60x = 98,251.80 × 21,110.80
  4. Step 4: Simplify right side
    65,491.60x = 2,074,174,099.44
  5. Step 5: Solve for x
    x = 2,074,174,099.44/65,491.60
  6. Step 6: Final answer
    x = 31,670.84

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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.