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Finding the Fourth Proportional to 66,010.62, 90,940.64 and 54,003.98

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Solution

The fourth proportional to 66,010.62, 90,940.64 and 54,003.98 is: 74,399.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,010.62 : 90,940.64 = 54,003.98 : x
  2. Step 2: Convert to fraction form
    66,010.62/90,940.64 = 54,003.98/x
  3. Step 3: Cross multiply
    66,010.62x = 90,940.64 × 54,003.98
  4. Step 4: Simplify right side
    66,010.62x = 4,911,156,503.75
  5. Step 5: Solve for x
    x = 4,911,156,503.75/66,010.62
  6. Step 6: Final answer
    x = 74,399.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.