Home / 82,138.08-122,612.94-72,173.60

Finding the Fourth Proportional to 82,138.08, 122,612.94 and 72,173.60

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Solution

The fourth proportional to 82,138.08, 122,612.94 and 72,173.60 is: 107,738.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,138.08 : 122,612.94 = 72,173.60 : x
  2. Step 2: Convert to fraction form
    82,138.08/122,612.94 = 72,173.60/x
  3. Step 3: Cross multiply
    82,138.08x = 122,612.94 × 72,173.60
  4. Step 4: Simplify right side
    82,138.08x = 8,849,417,286.38
  5. Step 5: Solve for x
    x = 8,849,417,286.38/82,138.08
  6. Step 6: Final answer
    x = 107,738.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.