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Finding the Fourth Proportional to 66,643.98, 99,971.12 and 22,270.89

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Solution

The fourth proportional to 66,643.98, 99,971.12 and 22,270.89 is: 33,408.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,643.98 : 99,971.12 = 22,270.89 : x
  2. Step 2: Convert to fraction form
    66,643.98/99,971.12 = 22,270.89/x
  3. Step 3: Cross multiply
    66,643.98x = 99,971.12 × 22,270.89
  4. Step 4: Simplify right side
    66,643.98x = 2,226,445,816.70
  5. Step 5: Solve for x
    x = 2,226,445,816.70/66,643.98
  6. Step 6: Final answer
    x = 33,408.06

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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.