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Finding the Fourth Proportional to 74,079, 102,229.74 and 40,545.72

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Solution

The fourth proportional to 74,079, 102,229.74 and 40,545.72 is: 55,953.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,079 : 102,229.74 = 40,545.72 : x
  2. Step 2: Convert to fraction form
    74,079/102,229.74 = 40,545.72/x
  3. Step 3: Cross multiply
    74,079x = 102,229.74 × 40,545.72
  4. Step 4: Simplify right side
    74,079x = 4,144,978,413.71
  5. Step 5: Solve for x
    x = 4,144,978,413.71/74,079
  6. Step 6: Final answer
    x = 55,953.49

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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.