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Finding the Fourth Proportional to 84,720.81, 127,044.30 and 28,550.45

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Solution

The fourth proportional to 84,720.81, 127,044.30 and 28,550.45 is: 42,813.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,720.81 : 127,044.30 = 28,550.45 : x
  2. Step 2: Convert to fraction form
    84,720.81/127,044.30 = 28,550.45/x
  3. Step 3: Cross multiply
    84,720.81x = 127,044.30 × 28,550.45
  4. Step 4: Simplify right side
    84,720.81x = 3,627,171,299.71
  5. Step 5: Solve for x
    x = 3,627,171,299.71/84,720.81
  6. Step 6: Final answer
    x = 42,813.23

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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.