Home / 81,454.20-122,181.30-71,612.70

Finding the Fourth Proportional to 81,454.20, 122,181.30 and 71,612.70

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Solution

The fourth proportional to 81,454.20, 122,181.30 and 71,612.70 is: 107,419.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,454.20 : 122,181.30 = 71,612.70 : x
  2. Step 2: Convert to fraction form
    81,454.20/122,181.30 = 71,612.70/x
  3. Step 3: Cross multiply
    81,454.20x = 122,181.30 × 71,612.70
  4. Step 4: Simplify right side
    81,454.20x = 8,749,732,782.51
  5. Step 5: Solve for x
    x = 8,749,732,782.51/81,454.20
  6. Step 6: Final answer
    x = 107,419.05

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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.