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Finding the Fourth Proportional to 78,831.60, 118,247.40 and 32,060.40

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Solution

The fourth proportional to 78,831.60, 118,247.40 and 32,060.40 is: 48,090.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,831.60 : 118,247.40 = 32,060.40 : x
  2. Step 2: Convert to fraction form
    78,831.60/118,247.40 = 32,060.40/x
  3. Step 3: Cross multiply
    78,831.60x = 118,247.40 × 32,060.40
  4. Step 4: Simplify right side
    78,831.60x = 3,791,058,942.96
  5. Step 5: Solve for x
    x = 3,791,058,942.96/78,831.60
  6. Step 6: Final answer
    x = 48,090.60

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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.