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Finding the Fourth Proportional to 208,415.05, 287,620.81 and 126,719.84

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Solution

The fourth proportional to 208,415.05, 287,620.81 and 126,719.84 is: 174,878.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,415.05 : 287,620.81 = 126,719.84 : x
  2. Step 2: Convert to fraction form
    208,415.05/287,620.81 = 126,719.84/x
  3. Step 3: Cross multiply
    208,415.05x = 287,620.81 × 126,719.84
  4. Step 4: Simplify right side
    208,415.05x = 36,447,263,023.87
  5. Step 5: Solve for x
    x = 36,447,263,023.87/208,415.05
  6. Step 6: Final answer
    x = 174,878.27

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1.5x scale

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.