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Finding the Fourth Proportional to 66,506.34, 91,704.33 and 54,368.94

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Solution

The fourth proportional to 66,506.34, 91,704.33 and 54,368.94 is: 74,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,506.34 : 91,704.33 = 54,368.94 : x
  2. Step 2: Convert to fraction form
    66,506.34/91,704.33 = 54,368.94/x
  3. Step 3: Cross multiply
    66,506.34x = 91,704.33 × 54,368.94
  4. Step 4: Simplify right side
    66,506.34x = 4,985,867,215.51
  5. Step 5: Solve for x
    x = 4,985,867,215.51/66,506.34
  6. Step 6: Final answer
    x = 74,968.30

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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.