Home / 261,877.20-392,556.60-128,648.40

Finding the Fourth Proportional to 261,877.20, 392,556.60 and 128,648.40

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Solution

The fourth proportional to 261,877.20, 392,556.60 and 128,648.40 is: 192,845.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,877.20 : 392,556.60 = 128,648.40 : x
  2. Step 2: Convert to fraction form
    261,877.20/392,556.60 = 128,648.40/x
  3. Step 3: Cross multiply
    261,877.20x = 392,556.60 × 128,648.40
  4. Step 4: Simplify right side
    261,877.20x = 50,501,778,499.44
  5. Step 5: Solve for x
    x = 50,501,778,499.44/261,877.20
  6. Step 6: Final answer
    x = 192,845.27

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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.