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Finding the Fourth Proportional to 127,587.20, 191,035.20 and 99,939.20

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Solution

The fourth proportional to 127,587.20, 191,035.20 and 99,939.20 is: 149,638.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,587.20 : 191,035.20 = 99,939.20 : x
  2. Step 2: Convert to fraction form
    127,587.20/191,035.20 = 99,939.20/x
  3. Step 3: Cross multiply
    127,587.20x = 191,035.20 × 99,939.20
  4. Step 4: Simplify right side
    127,587.20x = 19,091,905,059.84
  5. Step 5: Solve for x
    x = 19,091,905,059.84/127,587.20
  6. Step 6: Final answer
    x = 149,638.09

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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.