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Finding the Fourth Proportional to 84,707.28, 127,040.32 and 28,532.88

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Solution

The fourth proportional to 84,707.28, 127,040.32 and 28,532.88 is: 42,792.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,707.28 : 127,040.32 = 28,532.88 : x
  2. Step 2: Convert to fraction form
    84,707.28/127,040.32 = 28,532.88/x
  3. Step 3: Cross multiply
    84,707.28x = 127,040.32 × 28,532.88
  4. Step 4: Simplify right side
    84,707.28x = 3,624,826,205.72
  5. Step 5: Solve for x
    x = 3,624,826,205.72/84,707.28
  6. Step 6: Final answer
    x = 42,792.38

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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.