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Finding the Fourth Proportional to 78,528.88, 117,831.11 and 39,089.44

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Solution

The fourth proportional to 78,528.88, 117,831.11 and 39,089.44 is: 58,652.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,528.88 : 117,831.11 = 39,089.44 : x
  2. Step 2: Convert to fraction form
    78,528.88/117,831.11 = 39,089.44/x
  3. Step 3: Cross multiply
    78,528.88x = 117,831.11 × 39,089.44
  4. Step 4: Simplify right side
    78,528.88x = 4,605,951,613.05
  5. Step 5: Solve for x
    x = 4,605,951,613.05/78,528.88
  6. Step 6: Final answer
    x = 58,652.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.