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Finding the Fourth Proportional to 65,664.60, 98,503.74 and 21,289.56

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Solution

The fourth proportional to 65,664.60, 98,503.74 and 21,289.56 is: 31,936.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,664.60 : 98,503.74 = 21,289.56 : x
  2. Step 2: Convert to fraction form
    65,664.60/98,503.74 = 21,289.56/x
  3. Step 3: Cross multiply
    65,664.60x = 98,503.74 × 21,289.56
  4. Step 4: Simplify right side
    65,664.60x = 2,097,101,282.95
  5. Step 5: Solve for x
    x = 2,097,101,282.95/65,664.60
  6. Step 6: Final answer
    x = 31,936.56

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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.