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Finding the Fourth Proportional to 134,005.60, 200,716.80 and 81,323.20

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Solution

The fourth proportional to 134,005.60, 200,716.80 and 81,323.20 is: 121,807.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,005.60 : 200,716.80 = 81,323.20 : x
  2. Step 2: Convert to fraction form
    134,005.60/200,716.80 = 81,323.20/x
  3. Step 3: Cross multiply
    134,005.60x = 200,716.80 × 81,323.20
  4. Step 4: Simplify right side
    134,005.60x = 16,322,932,469.76
  5. Step 5: Solve for x
    x = 16,322,932,469.76/134,005.60
  6. Step 6: Final answer
    x = 121,807.84

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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.