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Finding the Fourth Proportional to 230,704.80, 318,373.40 and 128,728.40

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Solution

The fourth proportional to 230,704.80, 318,373.40 and 128,728.40 is: 177,645.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,704.80 : 318,373.40 = 128,728.40 : x
  2. Step 2: Convert to fraction form
    230,704.80/318,373.40 = 128,728.40/x
  3. Step 3: Cross multiply
    230,704.80x = 318,373.40 × 128,728.40
  4. Step 4: Simplify right side
    230,704.80x = 40,983,698,181.27
  5. Step 5: Solve for x
    x = 40,983,698,181.27/230,704.80
  6. Step 6: Final answer
    x = 177,645.63

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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.