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Finding the Fourth Proportional to 140,653.84, 194,102.36 and 76,992

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Solution

The fourth proportional to 140,653.84, 194,102.36 and 76,992 is: 106,248.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,653.84 : 194,102.36 = 76,992 : x
  2. Step 2: Convert to fraction form
    140,653.84/194,102.36 = 76,992/x
  3. Step 3: Cross multiply
    140,653.84x = 194,102.36 × 76,992
  4. Step 4: Simplify right side
    140,653.84x = 14,944,328,901.12
  5. Step 5: Solve for x
    x = 14,944,328,901.12/140,653.84
  6. Step 6: Final answer
    x = 106,248.99

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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.