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Finding the Fourth Proportional to 118,833.61, 178,130.47 and 74,491.50

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Solution

The fourth proportional to 118,833.61, 178,130.47 and 74,491.50 is: 111,662.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,833.61 : 178,130.47 = 74,491.50 : x
  2. Step 2: Convert to fraction form
    118,833.61/178,130.47 = 74,491.50/x
  3. Step 3: Cross multiply
    118,833.61x = 178,130.47 × 74,491.50
  4. Step 4: Simplify right side
    118,833.61x = 13,269,205,525.45
  5. Step 5: Solve for x
    x = 13,269,205,525.45/118,833.61
  6. Step 6: Final answer
    x = 111,662.06

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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.