Home / 85,612.20-128,418.30-26,442.60

Finding the Fourth Proportional to 85,612.20, 128,418.30 and 26,442.60

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Solution

The fourth proportional to 85,612.20, 128,418.30 and 26,442.60 is: 39,663.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,612.20 : 128,418.30 = 26,442.60 : x
  2. Step 2: Convert to fraction form
    85,612.20/128,418.30 = 26,442.60/x
  3. Step 3: Cross multiply
    85,612.20x = 128,418.30 × 26,442.60
  4. Step 4: Simplify right side
    85,612.20x = 3,395,713,739.58
  5. Step 5: Solve for x
    x = 3,395,713,739.58/85,612.20
  6. Step 6: Final answer
    x = 39,663.90

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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.