Home / 81,435.10-122,109.45-28,846.30

Finding the Fourth Proportional to 81,435.10, 122,109.45 and 28,846.30

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Solution

The fourth proportional to 81,435.10, 122,109.45 and 28,846.30 is: 43,254.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,435.10 : 122,109.45 = 28,846.30 : x
  2. Step 2: Convert to fraction form
    81,435.10/122,109.45 = 28,846.30/x
  3. Step 3: Cross multiply
    81,435.10x = 122,109.45 × 28,846.30
  4. Step 4: Simplify right side
    81,435.10x = 3,522,405,827.54
  5. Step 5: Solve for x
    x = 3,522,405,827.54/81,435.10
  6. Step 6: Final answer
    x = 43,254.15

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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.