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Finding the Fourth Proportional to 128,922.32, 193,266.84 and 45,796.88

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Solution

The fourth proportional to 128,922.32, 193,266.84 and 45,796.88 is: 68,653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,922.32 : 193,266.84 = 45,796.88 : x
  2. Step 2: Convert to fraction form
    128,922.32/193,266.84 = 45,796.88/x
  3. Step 3: Cross multiply
    128,922.32x = 193,266.84 × 45,796.88
  4. Step 4: Simplify right side
    128,922.32x = 8,851,018,279.46
  5. Step 5: Solve for x
    x = 8,851,018,279.46/128,922.32
  6. Step 6: Final answer
    x = 68,653.89

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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.