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Finding the Fourth Proportional to 421,155, 631,841.94 and 125,667

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Solution

The fourth proportional to 421,155, 631,841.94 and 125,667 is: 188,533.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,155 : 631,841.94 = 125,667 : x
  2. Step 2: Convert to fraction form
    421,155/631,841.94 = 125,667/x
  3. Step 3: Cross multiply
    421,155x = 631,841.94 × 125,667
  4. Step 4: Simplify right side
    421,155x = 79,401,681,073.98
  5. Step 5: Solve for x
    x = 79,401,681,073.98/421,155
  6. Step 6: Final answer
    x = 188,533.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.