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Finding the Fourth Proportional to 81,340.90, 122,000.10 and 25,219.60

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Solution

The fourth proportional to 81,340.90, 122,000.10 and 25,219.60 is: 37,825.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,340.90 : 122,000.10 = 25,219.60 : x
  2. Step 2: Convert to fraction form
    81,340.90/122,000.10 = 25,219.60/x
  3. Step 3: Cross multiply
    81,340.90x = 122,000.10 × 25,219.60
  4. Step 4: Simplify right side
    81,340.90x = 3,076,793,721.96
  5. Step 5: Solve for x
    x = 3,076,793,721.96/81,340.90
  6. Step 6: Final answer
    x = 37,825.91

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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.