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Finding the Fourth Proportional to 307,157.31, 423,911.41 and 171,203.67

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Solution

The fourth proportional to 307,157.31, 423,911.41 and 171,203.67 is: 236,280.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,157.31 : 423,911.41 = 171,203.67 : x
  2. Step 2: Convert to fraction form
    307,157.31/423,911.41 = 171,203.67/x
  3. Step 3: Cross multiply
    307,157.31x = 423,911.41 × 171,203.67
  4. Step 4: Simplify right side
    307,157.31x = 72,575,188,718.87
  5. Step 5: Solve for x
    x = 72,575,188,718.87/307,157.31
  6. Step 6: Final answer
    x = 236,280.19

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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.