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Finding the Fourth Proportional to 121,907.58, 168,239.90 and 68,196.22

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Solution

The fourth proportional to 121,907.58, 168,239.90 and 68,196.22 is: 94,114.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,907.58 : 168,239.90 = 68,196.22 : x
  2. Step 2: Convert to fraction form
    121,907.58/168,239.90 = 68,196.22/x
  3. Step 3: Cross multiply
    121,907.58x = 168,239.90 × 68,196.22
  4. Step 4: Simplify right side
    121,907.58x = 11,473,325,233.18
  5. Step 5: Solve for x
    x = 11,473,325,233.18/121,907.58
  6. Step 6: Final answer
    x = 94,114.95

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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.