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Finding the Fourth Proportional to 82,176.78, 122,670.71 and 72,212.28

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Solution

The fourth proportional to 82,176.78, 122,670.71 and 72,212.28 is: 107,796.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,176.78 : 122,670.71 = 72,212.28 : x
  2. Step 2: Convert to fraction form
    82,176.78/122,670.71 = 72,212.28/x
  3. Step 3: Cross multiply
    82,176.78x = 122,670.71 × 72,212.28
  4. Step 4: Simplify right side
    82,176.78x = 8,858,331,297.26
  5. Step 5: Solve for x
    x = 8,858,331,297.26/82,176.78
  6. Step 6: Final answer
    x = 107,796.04

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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.