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Finding the Fourth Proportional to 68,904.78, 103,356.09 and 39,259.50

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Solution

The fourth proportional to 68,904.78, 103,356.09 and 39,259.50 is: 58,888.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,904.78 : 103,356.09 = 39,259.50 : x
  2. Step 2: Convert to fraction form
    68,904.78/103,356.09 = 39,259.50/x
  3. Step 3: Cross multiply
    68,904.78x = 103,356.09 × 39,259.50
  4. Step 4: Simplify right side
    68,904.78x = 4,057,708,415.36
  5. Step 5: Solve for x
    x = 4,057,708,415.36/68,904.78
  6. Step 6: Final answer
    x = 58,888.63

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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.