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Finding the Fourth Proportional to 66,635.95, 91,955.10 and 36,421.03

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Solution

The fourth proportional to 66,635.95, 91,955.10 and 36,421.03 is: 50,259.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,635.95 : 91,955.10 = 36,421.03 : x
  2. Step 2: Convert to fraction form
    66,635.95/91,955.10 = 36,421.03/x
  3. Step 3: Cross multiply
    66,635.95x = 91,955.10 × 36,421.03
  4. Step 4: Simplify right side
    66,635.95x = 3,349,098,813.87
  5. Step 5: Solve for x
    x = 3,349,098,813.87/66,635.95
  6. Step 6: Final answer
    x = 50,259.64

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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.