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Finding the Fourth Proportional to 81,622.40, 122,404.80 and 29,033.60

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Solution

The fourth proportional to 81,622.40, 122,404.80 and 29,033.60 is: 43,540.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,622.40 : 122,404.80 = 29,033.60 : x
  2. Step 2: Convert to fraction form
    81,622.40/122,404.80 = 29,033.60/x
  3. Step 3: Cross multiply
    81,622.40x = 122,404.80 × 29,033.60
  4. Step 4: Simplify right side
    81,622.40x = 3,553,852,001.28
  5. Step 5: Solve for x
    x = 3,553,852,001.28/81,622.40
  6. Step 6: Final answer
    x = 43,540.16

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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.