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Finding the Fourth Proportional to 169,787, 254,292.69 and 81,103.25

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Solution

The fourth proportional to 169,787, 254,292.69 and 81,103.25 is: 121,469.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,787 : 254,292.69 = 81,103.25 : x
  2. Step 2: Convert to fraction form
    169,787/254,292.69 = 81,103.25/x
  3. Step 3: Cross multiply
    169,787x = 254,292.69 × 81,103.25
  4. Step 4: Simplify right side
    169,787x = 20,623,963,610.24
  5. Step 5: Solve for x
    x = 20,623,963,610.24/169,787
  6. Step 6: Final answer
    x = 121,469.63

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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.