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Finding the Fourth Proportional to 65,755.68, 98,638.92 and 21,381.45

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Solution

The fourth proportional to 65,755.68, 98,638.92 and 21,381.45 is: 32,073.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,755.68 : 98,638.92 = 21,381.45 : x
  2. Step 2: Convert to fraction form
    65,755.68/98,638.92 = 21,381.45/x
  3. Step 3: Cross multiply
    65,755.68x = 98,638.92 × 21,381.45
  4. Step 4: Simplify right side
    65,755.68x = 2,109,043,136.03
  5. Step 5: Solve for x
    x = 2,109,043,136.03/65,755.68
  6. Step 6: Final answer
    x = 32,073.93

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1.5x scale

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.