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Finding the Fourth Proportional to 84,980.76, 127,473.52 and 28,821

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Solution

The fourth proportional to 84,980.76, 127,473.52 and 28,821 is: 43,232.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,980.76 : 127,473.52 = 28,821 : x
  2. Step 2: Convert to fraction form
    84,980.76/127,473.52 = 28,821/x
  3. Step 3: Cross multiply
    84,980.76x = 127,473.52 × 28,821
  4. Step 4: Simplify right side
    84,980.76x = 3,673,914,319.92
  5. Step 5: Solve for x
    x = 3,673,914,319.92/84,980.76
  6. Step 6: Final answer
    x = 43,232.31

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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.