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Finding the Fourth Proportional to 43,079, 64,618.50 and 11,914.25

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Solution

The fourth proportional to 43,079, 64,618.50 and 11,914.25 is: 17,871.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,079 : 64,618.50 = 11,914.25 : x
  2. Step 2: Convert to fraction form
    43,079/64,618.50 = 11,914.25/x
  3. Step 3: Cross multiply
    43,079x = 64,618.50 × 11,914.25
  4. Step 4: Simplify right side
    43,079x = 769,880,963.63
  5. Step 5: Solve for x
    x = 769,880,963.63/43,079
  6. Step 6: Final answer
    x = 17,871.38

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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.