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Finding the Fourth Proportional to 65,446.97, 98,170.46 and 21,078.21

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Solution

The fourth proportional to 65,446.97, 98,170.46 and 21,078.21 is: 31,617.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,446.97 : 98,170.46 = 21,078.21 : x
  2. Step 2: Convert to fraction form
    65,446.97/98,170.46 = 21,078.21/x
  3. Step 3: Cross multiply
    65,446.97x = 98,170.46 × 21,078.21
  4. Step 4: Simplify right side
    65,446.97x = 2,069,257,466.29
  5. Step 5: Solve for x
    x = 2,069,257,466.29/65,446.97
  6. Step 6: Final answer
    x = 31,617.31

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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.