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Finding the Fourth Proportional to 151,100.48, 208,502.28 and 87,426.38

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Solution

The fourth proportional to 151,100.48, 208,502.28 and 87,426.38 is: 120,638.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,100.48 : 208,502.28 = 87,426.38 : x
  2. Step 2: Convert to fraction form
    151,100.48/208,502.28 = 87,426.38/x
  3. Step 3: Cross multiply
    151,100.48x = 208,502.28 × 87,426.38
  4. Step 4: Simplify right side
    151,100.48x = 18,228,598,519.64
  5. Step 5: Solve for x
    x = 18,228,598,519.64/151,100.48
  6. Step 6: Final answer
    x = 120,638.92

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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.