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Finding the Fourth Proportional to 71,204.60, 106,798.80 and 18,619.40

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Solution

The fourth proportional to 71,204.60, 106,798.80 and 18,619.40 is: 27,926.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,204.60 : 106,798.80 = 18,619.40 : x
  2. Step 2: Convert to fraction form
    71,204.60/106,798.80 = 18,619.40/x
  3. Step 3: Cross multiply
    71,204.60x = 106,798.80 × 18,619.40
  4. Step 4: Simplify right side
    71,204.60x = 1,988,529,576.72
  5. Step 5: Solve for x
    x = 1,988,529,576.72/71,204.60
  6. Step 6: Final answer
    x = 27,926.98

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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.