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Finding the Fourth Proportional to 201,780.66, 278,453.25 and 126,370.74

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Solution

The fourth proportional to 201,780.66, 278,453.25 and 126,370.74 is: 174,389.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,780.66 : 278,453.25 = 126,370.74 : x
  2. Step 2: Convert to fraction form
    201,780.66/278,453.25 = 126,370.74/x
  3. Step 3: Cross multiply
    201,780.66x = 278,453.25 × 126,370.74
  4. Step 4: Simplify right side
    201,780.66x = 35,188,343,257.91
  5. Step 5: Solve for x
    x = 35,188,343,257.91/201,780.66
  6. Step 6: Final answer
    x = 174,389.08

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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.