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Finding the Fourth Proportional to 121,425, 167,566.50 and 68,433

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Solution

The fourth proportional to 121,425, 167,566.50 and 68,433 is: 94,437.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,425 : 167,566.50 = 68,433 : x
  2. Step 2: Convert to fraction form
    121,425/167,566.50 = 68,433/x
  3. Step 3: Cross multiply
    121,425x = 167,566.50 × 68,433
  4. Step 4: Simplify right side
    121,425x = 11,467,078,294.50
  5. Step 5: Solve for x
    x = 11,467,078,294.50/121,425
  6. Step 6: Final answer
    x = 94,437.54

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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.