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Finding the Fourth Proportional to 342,003.80, 513,005.70 and 128,771.30

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Solution

The fourth proportional to 342,003.80, 513,005.70 and 128,771.30 is: 193,156.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,003.80 : 513,005.70 = 128,771.30 : x
  2. Step 2: Convert to fraction form
    342,003.80/513,005.70 = 128,771.30/x
  3. Step 3: Cross multiply
    342,003.80x = 513,005.70 × 128,771.30
  4. Step 4: Simplify right side
    342,003.80x = 66,060,410,896.41
  5. Step 5: Solve for x
    x = 66,060,410,896.41/342,003.80
  6. Step 6: Final answer
    x = 193,156.95

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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.