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Finding the Fourth Proportional to 70,959.07, 97,923.40 and 39,128.03

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Solution

The fourth proportional to 70,959.07, 97,923.40 and 39,128.03 is: 53,996.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,959.07 : 97,923.40 = 39,128.03 : x
  2. Step 2: Convert to fraction form
    70,959.07/97,923.40 = 39,128.03/x
  3. Step 3: Cross multiply
    70,959.07x = 97,923.40 × 39,128.03
  4. Step 4: Simplify right side
    70,959.07x = 3,831,549,732.90
  5. Step 5: Solve for x
    x = 3,831,549,732.90/70,959.07
  6. Step 6: Final answer
    x = 53,996.62

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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.