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Finding the Fourth Proportional to 81,799.20, 122,698.80 and 35,143.20

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Solution

The fourth proportional to 81,799.20, 122,698.80 and 35,143.20 is: 52,714.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,799.20 : 122,698.80 = 35,143.20 : x
  2. Step 2: Convert to fraction form
    81,799.20/122,698.80 = 35,143.20/x
  3. Step 3: Cross multiply
    81,799.20x = 122,698.80 × 35,143.20
  4. Step 4: Simplify right side
    81,799.20x = 4,312,028,468.16
  5. Step 5: Solve for x
    x = 4,312,028,468.16/81,799.20
  6. Step 6: Final answer
    x = 52,714.80

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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.