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Finding the Fourth Proportional to 260,513.01, 390,157.16 and 126,974.79

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Solution

The fourth proportional to 260,513.01, 390,157.16 and 126,974.79 is: 190,163.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,513.01 : 390,157.16 = 126,974.79 : x
  2. Step 2: Convert to fraction form
    260,513.01/390,157.16 = 126,974.79/x
  3. Step 3: Cross multiply
    260,513.01x = 390,157.16 × 126,974.79
  4. Step 4: Simplify right side
    260,513.01x = 49,540,122,823.12
  5. Step 5: Solve for x
    x = 49,540,122,823.12/260,513.01
  6. Step 6: Final answer
    x = 190,163.72

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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.