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Finding the Fourth Proportional to 118,032.20, 176,616.30 and 86,928.20

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Solution

The fourth proportional to 118,032.20, 176,616.30 and 86,928.20 is: 130,074.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,032.20 : 176,616.30 = 86,928.20 : x
  2. Step 2: Convert to fraction form
    118,032.20/176,616.30 = 86,928.20/x
  3. Step 3: Cross multiply
    118,032.20x = 176,616.30 × 86,928.20
  4. Step 4: Simplify right side
    118,032.20x = 15,352,937,049.66
  5. Step 5: Solve for x
    x = 15,352,937,049.66/118,032.20
  6. Step 6: Final answer
    x = 130,074.14

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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.