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Finding the Fourth Proportional to 121,646.40, 167,862.36 and 67,928.22

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Solution

The fourth proportional to 121,646.40, 167,862.36 and 67,928.22 is: 93,735.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,646.40 : 167,862.36 = 67,928.22 : x
  2. Step 2: Convert to fraction form
    121,646.40/167,862.36 = 67,928.22/x
  3. Step 3: Cross multiply
    121,646.40x = 167,862.36 × 67,928.22
  4. Step 4: Simplify right side
    121,646.40x = 11,402,591,319.80
  5. Step 5: Solve for x
    x = 11,402,591,319.80/121,646.40
  6. Step 6: Final answer
    x = 93,735.54

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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.