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Finding the Fourth Proportional to 81,702.40, 122,553.60 and 53,708.80

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Solution

The fourth proportional to 81,702.40, 122,553.60 and 53,708.80 is: 80,563.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,702.40 : 122,553.60 = 53,708.80 : x
  2. Step 2: Convert to fraction form
    81,702.40/122,553.60 = 53,708.80/x
  3. Step 3: Cross multiply
    81,702.40x = 122,553.60 × 53,708.80
  4. Step 4: Simplify right side
    81,702.40x = 6,582,206,791.68
  5. Step 5: Solve for x
    x = 6,582,206,791.68/81,702.40
  6. Step 6: Final answer
    x = 80,563.20

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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.