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Finding the Fourth Proportional to 66,895.84, 100,344.24 and 54,401.28

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Solution

The fourth proportional to 66,895.84, 100,344.24 and 54,401.28 is: 81,602.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,895.84 : 100,344.24 = 54,401.28 : x
  2. Step 2: Convert to fraction form
    66,895.84/100,344.24 = 54,401.28/x
  3. Step 3: Cross multiply
    66,895.84x = 100,344.24 × 54,401.28
  4. Step 4: Simplify right side
    66,895.84x = 5,458,855,096.63
  5. Step 5: Solve for x
    x = 5,458,855,096.63/66,895.84
  6. Step 6: Final answer
    x = 81,602.31

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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.