Home / 81,262.20-121,893.30-68,140.20

Finding the Fourth Proportional to 81,262.20, 121,893.30 and 68,140.20

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Solution

The fourth proportional to 81,262.20, 121,893.30 and 68,140.20 is: 102,210.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,262.20 : 121,893.30 = 68,140.20 : x
  2. Step 2: Convert to fraction form
    81,262.20/121,893.30 = 68,140.20/x
  3. Step 3: Cross multiply
    81,262.20x = 121,893.30 × 68,140.20
  4. Step 4: Simplify right side
    81,262.20x = 8,305,833,840.66
  5. Step 5: Solve for x
    x = 8,305,833,840.66/81,262.20
  6. Step 6: Final answer
    x = 102,210.30

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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.