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Finding the Fourth Proportional to 118,079.16, 162,887.79 and 74,984.91

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Solution

The fourth proportional to 118,079.16, 162,887.79 and 74,984.91 is: 103,440.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,079.16 : 162,887.79 = 74,984.91 : x
  2. Step 2: Convert to fraction form
    118,079.16/162,887.79 = 74,984.91/x
  3. Step 3: Cross multiply
    118,079.16x = 162,887.79 × 74,984.91
  4. Step 4: Simplify right side
    118,079.16x = 12,214,126,273.25
  5. Step 5: Solve for x
    x = 12,214,126,273.25/118,079.16
  6. Step 6: Final answer
    x = 103,440.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.