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Finding the Fourth Proportional to 84,717.81, 127,069.77 and 28,556.70

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Solution

The fourth proportional to 84,717.81, 127,069.77 and 28,556.70 is: 42,832.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,717.81 : 127,069.77 = 28,556.70 : x
  2. Step 2: Convert to fraction form
    84,717.81/127,069.77 = 28,556.70/x
  3. Step 3: Cross multiply
    84,717.81x = 127,069.77 × 28,556.70
  4. Step 4: Simplify right side
    84,717.81x = 3,628,693,300.96
  5. Step 5: Solve for x
    x = 3,628,693,300.96/84,717.81
  6. Step 6: Final answer
    x = 42,832.71

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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.