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Finding the Fourth Proportional to 120,613.61, 166,466.71 and 66,915.92

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Solution

The fourth proportional to 120,613.61, 166,466.71 and 66,915.92 is: 92,355.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,613.61 : 166,466.71 = 66,915.92 : x
  2. Step 2: Convert to fraction form
    120,613.61/166,466.71 = 66,915.92/x
  3. Step 3: Cross multiply
    120,613.61x = 166,466.71 × 66,915.92
  4. Step 4: Simplify right side
    120,613.61x = 11,139,273,297.90
  5. Step 5: Solve for x
    x = 11,139,273,297.90/120,613.61
  6. Step 6: Final answer
    x = 92,355.03

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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.