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Finding the Fourth Proportional to 74,404.92, 102,679.54 and 40,413.72

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Solution

The fourth proportional to 74,404.92, 102,679.54 and 40,413.72 is: 55,771.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,404.92 : 102,679.54 = 40,413.72 : x
  2. Step 2: Convert to fraction form
    74,404.92/102,679.54 = 40,413.72/x
  3. Step 3: Cross multiply
    74,404.92x = 102,679.54 × 40,413.72
  4. Step 4: Simplify right side
    74,404.92x = 4,149,662,179.29
  5. Step 5: Solve for x
    x = 4,149,662,179.29/74,404.92
  6. Step 6: Final answer
    x = 55,771.34

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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.