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Finding the Fourth Proportional to 121,425.88, 167,468.70 and 101,969.80

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Solution

The fourth proportional to 121,425.88, 167,468.70 and 101,969.80 is: 140,635.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,425.88 : 167,468.70 = 101,969.80 : x
  2. Step 2: Convert to fraction form
    121,425.88/167,468.70 = 101,969.80/x
  3. Step 3: Cross multiply
    121,425.88x = 167,468.70 × 101,969.80
  4. Step 4: Simplify right side
    121,425.88x = 17,076,749,845.26
  5. Step 5: Solve for x
    x = 17,076,749,845.26/121,425.88
  6. Step 6: Final answer
    x = 140,635.17

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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.