Home / 128,211.90-192,353.40-53,367.30

Finding the Fourth Proportional to 128,211.90, 192,353.40 and 53,367.30

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Solution

The fourth proportional to 128,211.90, 192,353.40 and 53,367.30 is: 80,065.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,211.90 : 192,353.40 = 53,367.30 : x
  2. Step 2: Convert to fraction form
    128,211.90/192,353.40 = 53,367.30/x
  3. Step 3: Cross multiply
    128,211.90x = 192,353.40 × 53,367.30
  4. Step 4: Simplify right side
    128,211.90x = 10,265,381,603.82
  5. Step 5: Solve for x
    x = 10,265,381,603.82/128,211.90
  6. Step 6: Final answer
    x = 80,065.75

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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.