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Finding the Fourth Proportional to 66,065.73, 91,149.50 and 36,989.81

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Solution

The fourth proportional to 66,065.73, 91,149.50 and 36,989.81 is: 51,034.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,065.73 : 91,149.50 = 36,989.81 : x
  2. Step 2: Convert to fraction form
    66,065.73/91,149.50 = 36,989.81/x
  3. Step 3: Cross multiply
    66,065.73x = 91,149.50 × 36,989.81
  4. Step 4: Simplify right side
    66,065.73x = 3,371,602,686.60
  5. Step 5: Solve for x
    x = 3,371,602,686.60/66,065.73
  6. Step 6: Final answer
    x = 51,034.06

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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.