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Finding the Fourth Proportional to 66,509.84, 91,709.16 and 54,372.44

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Solution

The fourth proportional to 66,509.84, 91,709.16 and 54,372.44 is: 74,973.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,509.84 : 91,709.16 = 54,372.44 : x
  2. Step 2: Convert to fraction form
    66,509.84/91,709.16 = 54,372.44/x
  3. Step 3: Cross multiply
    66,509.84x = 91,709.16 × 54,372.44
  4. Step 4: Simplify right side
    66,509.84x = 4,986,450,799.55
  5. Step 5: Solve for x
    x = 4,986,450,799.55/66,509.84
  6. Step 6: Final answer
    x = 74,973.13

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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.