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Finding the Fourth Proportional to 172,678.78, 238,313.78 and 101,054.54

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Solution

The fourth proportional to 172,678.78, 238,313.78 and 101,054.54 is: 139,465.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,678.78 : 238,313.78 = 101,054.54 : x
  2. Step 2: Convert to fraction form
    172,678.78/238,313.78 = 101,054.54/x
  3. Step 3: Cross multiply
    172,678.78x = 238,313.78 × 101,054.54
  4. Step 4: Simplify right side
    172,678.78x = 24,082,689,413.56
  5. Step 5: Solve for x
    x = 24,082,689,413.56/172,678.78
  6. Step 6: Final answer
    x = 139,465.25

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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.