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Finding the Fourth Proportional to 84,175.20, 126,262.80 and 65,512.80

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Solution

The fourth proportional to 84,175.20, 126,262.80 and 65,512.80 is: 98,269.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,175.20 : 126,262.80 = 65,512.80 : x
  2. Step 2: Convert to fraction form
    84,175.20/126,262.80 = 65,512.80/x
  3. Step 3: Cross multiply
    84,175.20x = 126,262.80 × 65,512.80
  4. Step 4: Simplify right side
    84,175.20x = 8,271,829,563.84
  5. Step 5: Solve for x
    x = 8,271,829,563.84/84,175.20
  6. Step 6: Final answer
    x = 98,269.20

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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.