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Finding the Fourth Proportional to 128,259.17, 176,997.11 and 71,670.54

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Solution

The fourth proportional to 128,259.17, 176,997.11 and 71,670.54 is: 98,905.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,259.17 : 176,997.11 = 71,670.54 : x
  2. Step 2: Convert to fraction form
    128,259.17/176,997.11 = 71,670.54/x
  3. Step 3: Cross multiply
    128,259.17x = 176,997.11 × 71,670.54
  4. Step 4: Simplify right side
    128,259.17x = 12,685,478,093.79
  5. Step 5: Solve for x
    x = 12,685,478,093.79/128,259.17
  6. Step 6: Final answer
    x = 98,905.04

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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.