Home / 261,310.76-392,040.66-128,229.38

Finding the Fourth Proportional to 261,310.76, 392,040.66 and 128,229.38

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Solution

The fourth proportional to 261,310.76, 392,040.66 and 128,229.38 is: 192,380.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,310.76 : 392,040.66 = 128,229.38 : x
  2. Step 2: Convert to fraction form
    261,310.76/392,040.66 = 128,229.38/x
  3. Step 3: Cross multiply
    261,310.76x = 392,040.66 × 128,229.38
  4. Step 4: Simplify right side
    261,310.76x = 50,271,130,766.59
  5. Step 5: Solve for x
    x = 50,271,130,766.59/261,310.76
  6. Step 6: Final answer
    x = 192,380.64

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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.