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Finding the Fourth Proportional to 76,717.67, 105,866.36 and 42,725.54

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Solution

The fourth proportional to 76,717.67, 105,866.36 and 42,725.54 is: 58,959.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,717.67 : 105,866.36 = 42,725.54 : x
  2. Step 2: Convert to fraction form
    76,717.67/105,866.36 = 42,725.54/x
  3. Step 3: Cross multiply
    76,717.67x = 105,866.36 × 42,725.54
  4. Step 4: Simplify right side
    76,717.67x = 4,523,197,610.09
  5. Step 5: Solve for x
    x = 4,523,197,610.09/76,717.67
  6. Step 6: Final answer
    x = 58,959.01

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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.