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Finding the Fourth Proportional to 71,187.61, 106,787.57 and 18,597.09

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Solution

The fourth proportional to 71,187.61, 106,787.57 and 18,597.09 is: 27,897.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,187.61 : 106,787.57 = 18,597.09 : x
  2. Step 2: Convert to fraction form
    71,187.61/106,787.57 = 18,597.09/x
  3. Step 3: Cross multiply
    71,187.61x = 106,787.57 × 18,597.09
  4. Step 4: Simplify right side
    71,187.61x = 1,985,938,357.64
  5. Step 5: Solve for x
    x = 1,985,938,357.64/71,187.61
  6. Step 6: Final answer
    x = 27,897.25

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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.