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Finding the Fourth Proportional to 245,555.28, 338,770.35 and 138,100.68

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Solution

The fourth proportional to 245,555.28, 338,770.35 and 138,100.68 is: 190,524.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,555.28 : 338,770.35 = 138,100.68 : x
  2. Step 2: Convert to fraction form
    245,555.28/338,770.35 = 138,100.68/x
  3. Step 3: Cross multiply
    245,555.28x = 338,770.35 × 138,100.68
  4. Step 4: Simplify right side
    245,555.28x = 46,784,415,698.84
  5. Step 5: Solve for x
    x = 46,784,415,698.84/245,555.28
  6. Step 6: Final answer
    x = 190,524.98

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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.