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Finding the Fourth Proportional to 66,086.96, 91,193.64 and 39,224.72

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Solution

The fourth proportional to 66,086.96, 91,193.64 and 39,224.72 is: 54,126.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,086.96 : 91,193.64 = 39,224.72 : x
  2. Step 2: Convert to fraction form
    66,086.96/91,193.64 = 39,224.72/x
  3. Step 3: Cross multiply
    66,086.96x = 91,193.64 × 39,224.72
  4. Step 4: Simplify right side
    66,086.96x = 3,577,044,994.78
  5. Step 5: Solve for x
    x = 3,577,044,994.78/66,086.96
  6. Step 6: Final answer
    x = 54,126.34

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1.5x scale

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.