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Finding the Fourth Proportional to 70,917.76, 97,866.01 and 39,086.70

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Solution

The fourth proportional to 70,917.76, 97,866.01 and 39,086.70 is: 53,939.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,917.76 : 97,866.01 = 39,086.70 : x
  2. Step 2: Convert to fraction form
    70,917.76/97,866.01 = 39,086.70/x
  3. Step 3: Cross multiply
    70,917.76x = 97,866.01 × 39,086.70
  4. Step 4: Simplify right side
    70,917.76x = 3,825,259,373.07
  5. Step 5: Solve for x
    x = 3,825,259,373.07/70,917.76
  6. Step 6: Final answer
    x = 53,939.37

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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.