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Finding the Fourth Proportional to 121,364.39, 167,485.05 and 67,643.64

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Solution

The fourth proportional to 121,364.39, 167,485.05 and 67,643.64 is: 93,349.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,364.39 : 167,485.05 = 67,643.64 : x
  2. Step 2: Convert to fraction form
    121,364.39/167,485.05 = 67,643.64/x
  3. Step 3: Cross multiply
    121,364.39x = 167,485.05 × 67,643.64
  4. Step 4: Simplify right side
    121,364.39x = 11,329,298,427.58
  5. Step 5: Solve for x
    x = 11,329,298,427.58/121,364.39
  6. Step 6: Final answer
    x = 93,349.44

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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.