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Finding the Fourth Proportional to 189,978,756.54, 262,171,188.72 and 103,058,628.54

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Solution

The fourth proportional to 189,978,756.54, 262,171,188.72 and 103,058,628.54 is: 142,221,181.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,978,756.54 : 262,171,188.72 = 103,058,628.54 : x
  2. Step 2: Convert to fraction form
    189,978,756.54/262,171,188.72 = 103,058,628.54/x
  3. Step 3: Cross multiply
    189,978,756.54x = 262,171,188.72 × 103,058,628.54
  4. Step 4: Simplify right side
    189,978,756.54x = 27,019,003,152,184,720
  5. Step 5: Solve for x
    x = 27,019,003,152,184,720/189,978,756.54
  6. Step 6: Final answer
    x = 142,221,181.17

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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.