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Finding the Fourth Proportional to 65,712.60, 98,583.30 and 21,331.80

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Solution

The fourth proportional to 65,712.60, 98,583.30 and 21,331.80 is: 32,002.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,712.60 : 98,583.30 = 21,331.80 : x
  2. Step 2: Convert to fraction form
    65,712.60/98,583.30 = 21,331.80/x
  3. Step 3: Cross multiply
    65,712.60x = 98,583.30 × 21,331.80
  4. Step 4: Simplify right side
    65,712.60x = 2,102,959,238.94
  5. Step 5: Solve for x
    x = 2,102,959,238.94/65,712.60
  6. Step 6: Final answer
    x = 32,002.37

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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.