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Finding the Fourth Proportional to 197,691.64, 272,932.20 and 122,342.20

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Solution

The fourth proportional to 197,691.64, 272,932.20 and 122,342.20 is: 168,905.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,691.64 : 272,932.20 = 122,342.20 : x
  2. Step 2: Convert to fraction form
    197,691.64/272,932.20 = 122,342.20/x
  3. Step 3: Cross multiply
    197,691.64x = 272,932.20 × 122,342.20
  4. Step 4: Simplify right side
    197,691.64x = 33,391,125,798.84
  5. Step 5: Solve for x
    x = 33,391,125,798.84/197,691.64
  6. Step 6: Final answer
    x = 168,905.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.