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Finding the Fourth Proportional to 138,348.42, 207,189.96 and 79,004.22

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Solution

The fourth proportional to 138,348.42, 207,189.96 and 79,004.22 is: 118,316.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,348.42 : 207,189.96 = 79,004.22 : x
  2. Step 2: Convert to fraction form
    138,348.42/207,189.96 = 79,004.22/x
  3. Step 3: Cross multiply
    138,348.42x = 207,189.96 × 79,004.22
  4. Step 4: Simplify right side
    138,348.42x = 16,368,881,181.63
  5. Step 5: Solve for x
    x = 16,368,881,181.63/138,348.42
  6. Step 6: Final answer
    x = 118,316.36

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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.