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Finding the Fourth Proportional to 169,785, 254,289.69 and 81,101.25

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Solution

The fourth proportional to 169,785, 254,289.69 and 81,101.25 is: 121,466.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,785 : 254,289.69 = 81,101.25 : x
  2. Step 2: Convert to fraction form
    169,785/254,289.69 = 81,101.25/x
  3. Step 3: Cross multiply
    169,785x = 254,289.69 × 81,101.25
  4. Step 4: Simplify right side
    169,785x = 20,623,211,721.11
  5. Step 5: Solve for x
    x = 20,623,211,721.11/169,785
  6. Step 6: Final answer
    x = 121,466.63

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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.