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Finding the Fourth Proportional to 69,780.51, 104,671.17 and 17,189.64

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Solution

The fourth proportional to 69,780.51, 104,671.17 and 17,189.64 is: 25,784.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,780.51 : 104,671.17 = 17,189.64 : x
  2. Step 2: Convert to fraction form
    69,780.51/104,671.17 = 17,189.64/x
  3. Step 3: Cross multiply
    69,780.51x = 104,671.17 × 17,189.64
  4. Step 4: Simplify right side
    69,780.51x = 1,799,259,730.68
  5. Step 5: Solve for x
    x = 1,799,259,730.68/69,780.51
  6. Step 6: Final answer
    x = 25,784.56

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1.5x scale

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.