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Finding the Fourth Proportional to 121,693.54, 167,936.74 and 67,978.66

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Solution

The fourth proportional to 121,693.54, 167,936.74 and 67,978.66 is: 93,810.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,693.54 : 167,936.74 = 67,978.66 : x
  2. Step 2: Convert to fraction form
    121,693.54/167,936.74 = 67,978.66/x
  3. Step 3: Cross multiply
    121,693.54x = 167,936.74 × 67,978.66
  4. Step 4: Simplify right side
    121,693.54x = 11,416,114,549.97
  5. Step 5: Solve for x
    x = 11,416,114,549.97/121,693.54
  6. Step 6: Final answer
    x = 93,810.36

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1.5x scale

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.