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Finding the Fourth Proportional to 201,605.79, 278,100.12 and 126,023.07

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Solution

The fourth proportional to 201,605.79, 278,100.12 and 126,023.07 is: 173,839.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,605.79 : 278,100.12 = 126,023.07 : x
  2. Step 2: Convert to fraction form
    201,605.79/278,100.12 = 126,023.07/x
  3. Step 3: Cross multiply
    201,605.79x = 278,100.12 × 126,023.07
  4. Step 4: Simplify right side
    201,605.79x = 35,047,030,889.77
  5. Step 5: Solve for x
    x = 35,047,030,889.77/201,605.79
  6. Step 6: Final answer
    x = 173,839.41

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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.