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Finding the Fourth Proportional to 129,090.74, 193,221.71 and 68,968.97

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Solution

The fourth proportional to 129,090.74, 193,221.71 and 68,968.97 is: 103,232.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,090.74 : 193,221.71 = 68,968.97 : x
  2. Step 2: Convert to fraction form
    129,090.74/193,221.71 = 68,968.97/x
  3. Step 3: Cross multiply
    129,090.74x = 193,221.71 × 68,968.97
  4. Step 4: Simplify right side
    129,090.74x = 13,326,301,975.49
  5. Step 5: Solve for x
    x = 13,326,301,975.49/129,090.74
  6. Step 6: Final answer
    x = 103,232.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.