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Finding the Fourth Proportional to 121,068.54, 167,080 and 100,891.66

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Solution

The fourth proportional to 121,068.54, 167,080 and 100,891.66 is: 139,235.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,068.54 : 167,080 = 100,891.66 : x
  2. Step 2: Convert to fraction form
    121,068.54/167,080 = 100,891.66/x
  3. Step 3: Cross multiply
    121,068.54x = 167,080 × 100,891.66
  4. Step 4: Simplify right side
    121,068.54x = 16,856,978,552.80
  5. Step 5: Solve for x
    x = 16,856,978,552.80/121,068.54
  6. Step 6: Final answer
    x = 139,235.00

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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.