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Finding the Fourth Proportional to 140,407.79, 193,762.85 and 76,745.59

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Solution

The fourth proportional to 140,407.79, 193,762.85 and 76,745.59 is: 105,908.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,407.79 : 193,762.85 = 76,745.59 : x
  2. Step 2: Convert to fraction form
    140,407.79/193,762.85 = 76,745.59/x
  3. Step 3: Cross multiply
    140,407.79x = 193,762.85 × 76,745.59
  4. Step 4: Simplify right side
    140,407.79x = 14,870,444,243.33
  5. Step 5: Solve for x
    x = 14,870,444,243.33/140,407.79
  6. Step 6: Final answer
    x = 105,908.97

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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.