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Finding the Fourth Proportional to 127,906.50, 176,515.74 and 71,328.78

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Solution

The fourth proportional to 127,906.50, 176,515.74 and 71,328.78 is: 98,436.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,906.50 : 176,515.74 = 71,328.78 : x
  2. Step 2: Convert to fraction form
    127,906.50/176,515.74 = 71,328.78/x
  3. Step 3: Cross multiply
    127,906.50x = 176,515.74 × 71,328.78
  4. Step 4: Simplify right side
    127,906.50x = 12,590,652,385.00
  5. Step 5: Solve for x
    x = 12,590,652,385.00/127,906.50
  6. Step 6: Final answer
    x = 98,436.38

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1.5x scale

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.