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Finding the Fourth Proportional to 140,400.12, 193,745.48 and 76,737.97

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Solution

The fourth proportional to 140,400.12, 193,745.48 and 76,737.97 is: 105,894.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,400.12 : 193,745.48 = 76,737.97 : x
  2. Step 2: Convert to fraction form
    140,400.12/193,745.48 = 76,737.97/x
  3. Step 3: Cross multiply
    140,400.12x = 193,745.48 × 76,737.97
  4. Step 4: Simplify right side
    140,400.12x = 14,867,634,831.88
  5. Step 5: Solve for x
    x = 14,867,634,831.88/140,400.12
  6. Step 6: Final answer
    x = 105,894.74

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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.