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Finding the Fourth Proportional to 71,179, 106,783.66 and 21,263

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Solution

The fourth proportional to 71,179, 106,783.66 and 21,263 is: 31,899.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,179 : 106,783.66 = 21,263 : x
  2. Step 2: Convert to fraction form
    71,179/106,783.66 = 21,263/x
  3. Step 3: Cross multiply
    71,179x = 106,783.66 × 21,263
  4. Step 4: Simplify right side
    71,179x = 2,270,540,962.58
  5. Step 5: Solve for x
    x = 2,270,540,962.58/71,179
  6. Step 6: Final answer
    x = 31,899.03

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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.