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Finding the Fourth Proportional to 109,892.40, 164,838.60 and 71,838.60

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Solution

The fourth proportional to 109,892.40, 164,838.60 and 71,838.60 is: 107,757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,892.40 : 164,838.60 = 71,838.60 : x
  2. Step 2: Convert to fraction form
    109,892.40/164,838.60 = 71,838.60/x
  3. Step 3: Cross multiply
    109,892.40x = 164,838.60 × 71,838.60
  4. Step 4: Simplify right side
    109,892.40x = 11,841,774,249.96
  5. Step 5: Solve for x
    x = 11,841,774,249.96/109,892.40
  6. Step 6: Final answer
    x = 107,757.90

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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.