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Finding the Fourth Proportional to 76,926.97, 106,060.54 and 63,078.28

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Solution

The fourth proportional to 76,926.97, 106,060.54 and 63,078.28 is: 86,967.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,926.97 : 106,060.54 = 63,078.28 : x
  2. Step 2: Convert to fraction form
    76,926.97/106,060.54 = 63,078.28/x
  3. Step 3: Cross multiply
    76,926.97x = 106,060.54 × 63,078.28
  4. Step 4: Simplify right side
    76,926.97x = 6,690,116,439.07
  5. Step 5: Solve for x
    x = 6,690,116,439.07/76,926.97
  6. Step 6: Final answer
    x = 86,967.11

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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.