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Finding the Fourth Proportional to 148,431.60, 204,831.72 and 80,445.60

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Solution

The fourth proportional to 148,431.60, 204,831.72 and 80,445.60 is: 111,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,431.60 : 204,831.72 = 80,445.60 : x
  2. Step 2: Convert to fraction form
    148,431.60/204,831.72 = 80,445.60/x
  3. Step 3: Cross multiply
    148,431.60x = 204,831.72 × 80,445.60
  4. Step 4: Simplify right side
    148,431.60x = 16,477,810,614.43
  5. Step 5: Solve for x
    x = 16,477,810,614.43/148,431.60
  6. Step 6: Final answer
    x = 111,012.82

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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.