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Finding the Fourth Proportional to 66,010.61, 90,940.65 and 54,003.98

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Solution

The fourth proportional to 66,010.61, 90,940.65 and 54,003.98 is: 74,399.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,010.61 : 90,940.65 = 54,003.98 : x
  2. Step 2: Convert to fraction form
    66,010.61/90,940.65 = 54,003.98/x
  3. Step 3: Cross multiply
    66,010.61x = 90,940.65 × 54,003.98
  4. Step 4: Simplify right side
    66,010.61x = 4,911,157,043.79
  5. Step 5: Solve for x
    x = 4,911,157,043.79/66,010.61
  6. Step 6: Final answer
    x = 74,399.51

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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.