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Finding the Fourth Proportional to 85,874.40, 118,506.96 and 47,636.64

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Solution

The fourth proportional to 85,874.40, 118,506.96 and 47,636.64 is: 65,738.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,874.40 : 118,506.96 = 47,636.64 : x
  2. Step 2: Convert to fraction form
    85,874.40/118,506.96 = 47,636.64/x
  3. Step 3: Cross multiply
    85,874.40x = 118,506.96 × 47,636.64
  4. Step 4: Simplify right side
    85,874.40x = 5,645,273,391.01
  5. Step 5: Solve for x
    x = 5,645,273,391.01/85,874.40
  6. Step 6: Final answer
    x = 65,738.72

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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.