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Finding the Fourth Proportional to 118,083.40, 176,865.90 and 115,491.40

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Solution

The fourth proportional to 118,083.40, 176,865.90 and 115,491.40 is: 172,983.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,083.40 : 176,865.90 = 115,491.40 : x
  2. Step 2: Convert to fraction form
    118,083.40/176,865.90 = 115,491.40/x
  3. Step 3: Cross multiply
    118,083.40x = 176,865.90 × 115,491.40
  4. Step 4: Simplify right side
    118,083.40x = 20,426,490,403.26
  5. Step 5: Solve for x
    x = 20,426,490,403.26/118,083.40
  6. Step 6: Final answer
    x = 172,983.59

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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.