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Finding the Fourth Proportional to 101,519.78, 140,161.03 and 65,237.45

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Solution

The fourth proportional to 101,519.78, 140,161.03 and 65,237.45 is: 90,068.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,519.78 : 140,161.03 = 65,237.45 : x
  2. Step 2: Convert to fraction form
    101,519.78/140,161.03 = 65,237.45/x
  3. Step 3: Cross multiply
    101,519.78x = 140,161.03 × 65,237.45
  4. Step 4: Simplify right side
    101,519.78x = 9,143,748,478.04
  5. Step 5: Solve for x
    x = 9,143,748,478.04/101,519.78
  6. Step 6: Final answer
    x = 90,068.64

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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.