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Finding the Fourth Proportional to 66,131, 91,258.16 and 35,915.64

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Solution

The fourth proportional to 66,131, 91,258.16 and 35,915.64 is: 49,562.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,131 : 91,258.16 = 35,915.64 : x
  2. Step 2: Convert to fraction form
    66,131/91,258.16 = 35,915.64/x
  3. Step 3: Cross multiply
    66,131x = 91,258.16 × 35,915.64
  4. Step 4: Simplify right side
    66,131x = 3,277,595,221.62
  5. Step 5: Solve for x
    x = 3,277,595,221.62/66,131
  6. Step 6: Final answer
    x = 49,562.16

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1.5x scale

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.