Home / 81,422.40-122,135.20-53,520.32

Finding the Fourth Proportional to 81,422.40, 122,135.20 and 53,520.32

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Solution

The fourth proportional to 81,422.40, 122,135.20 and 53,520.32 is: 80,281.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,422.40 : 122,135.20 = 53,520.32 : x
  2. Step 2: Convert to fraction form
    81,422.40/122,135.20 = 53,520.32/x
  3. Step 3: Cross multiply
    81,422.40x = 122,135.20 × 53,520.32
  4. Step 4: Simplify right side
    81,422.40x = 6,536,714,987.26
  5. Step 5: Solve for x
    x = 6,536,714,987.26/81,422.40
  6. Step 6: Final answer
    x = 80,281.53

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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.