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Finding the Fourth Proportional to 123,407.44, 170,302.28 and 66,818.80

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Solution

The fourth proportional to 123,407.44, 170,302.28 and 66,818.80 is: 92,209.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,407.44 : 170,302.28 = 66,818.80 : x
  2. Step 2: Convert to fraction form
    123,407.44/170,302.28 = 66,818.80/x
  3. Step 3: Cross multiply
    123,407.44x = 170,302.28 × 66,818.80
  4. Step 4: Simplify right side
    123,407.44x = 11,379,393,986.86
  5. Step 5: Solve for x
    x = 11,379,393,986.86/123,407.44
  6. Step 6: Final answer
    x = 92,209.95

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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.