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Finding the Fourth Proportional to 68,965.51, 103,435.28 and 21,573.50

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Solution

The fourth proportional to 68,965.51, 103,435.28 and 21,573.50 is: 32,356.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,965.51 : 103,435.28 = 21,573.50 : x
  2. Step 2: Convert to fraction form
    68,965.51/103,435.28 = 21,573.50/x
  3. Step 3: Cross multiply
    68,965.51x = 103,435.28 × 21,573.50
  4. Step 4: Simplify right side
    68,965.51x = 2,231,460,905.21
  5. Step 5: Solve for x
    x = 2,231,460,905.21/68,965.51
  6. Step 6: Final answer
    x = 32,356.19

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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.