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Finding the Fourth Proportional to 127,188.54, 190,657.89 and 71,055.54

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Solution

The fourth proportional to 127,188.54, 190,657.89 and 71,055.54 is: 106,513.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,188.54 : 190,657.89 = 71,055.54 : x
  2. Step 2: Convert to fraction form
    127,188.54/190,657.89 = 71,055.54/x
  3. Step 3: Cross multiply
    127,188.54x = 190,657.89 × 71,055.54
  4. Step 4: Simplify right side
    127,188.54x = 13,547,299,329.21
  5. Step 5: Solve for x
    x = 13,547,299,329.21/127,188.54
  6. Step 6: Final answer
    x = 106,513.52

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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.