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Finding the Fourth Proportional to 77,632.88, 115,873.37 and 66,913.34

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Solution

The fourth proportional to 77,632.88, 115,873.37 and 66,913.34 is: 99,873.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,632.88 : 115,873.37 = 66,913.34 : x
  2. Step 2: Convert to fraction form
    77,632.88/115,873.37 = 66,913.34/x
  3. Step 3: Cross multiply
    77,632.88x = 115,873.37 × 66,913.34
  4. Step 4: Simplify right side
    77,632.88x = 7,753,473,791.67
  5. Step 5: Solve for x
    x = 7,753,473,791.67/77,632.88
  6. Step 6: Final answer
    x = 99,873.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.