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Finding the Fourth Proportional to 66,443.79, 91,689.06 and 36,228.87

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Solution

The fourth proportional to 66,443.79, 91,689.06 and 36,228.87 is: 49,994.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,443.79 : 91,689.06 = 36,228.87 : x
  2. Step 2: Convert to fraction form
    66,443.79/91,689.06 = 36,228.87/x
  3. Step 3: Cross multiply
    66,443.79x = 91,689.06 × 36,228.87
  4. Step 4: Simplify right side
    66,443.79x = 3,321,791,171.02
  5. Step 5: Solve for x
    x = 3,321,791,171.02/66,443.79
  6. Step 6: Final answer
    x = 49,994.00

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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.