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Finding the Fourth Proportional to 140,390.88, 193,739.76 and 76,729.44

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Solution

The fourth proportional to 140,390.88, 193,739.76 and 76,729.44 is: 105,886.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,390.88 : 193,739.76 = 76,729.44 : x
  2. Step 2: Convert to fraction form
    140,390.88/193,739.76 = 76,729.44/x
  3. Step 3: Cross multiply
    140,390.88x = 193,739.76 × 76,729.44
  4. Step 4: Simplify right side
    140,390.88x = 14,865,543,290.53
  5. Step 5: Solve for x
    x = 14,865,543,290.53/140,390.88
  6. Step 6: Final answer
    x = 105,886.82

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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.