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Finding the Fourth Proportional to 66,620.96, 91,938.12 and 36,407.55

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Solution

The fourth proportional to 66,620.96, 91,938.12 and 36,407.55 is: 50,243.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,620.96 : 91,938.12 = 36,407.55 : x
  2. Step 2: Convert to fraction form
    66,620.96/91,938.12 = 36,407.55/x
  3. Step 3: Cross multiply
    66,620.96x = 91,938.12 × 36,407.55
  4. Step 4: Simplify right side
    66,620.96x = 3,347,241,700.81
  5. Step 5: Solve for x
    x = 3,347,241,700.81/66,620.96
  6. Step 6: Final answer
    x = 50,243.08

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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.