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Finding the Fourth Proportional to 255,221.72, 383,069.40 and 128,950.67

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Solution

The fourth proportional to 255,221.72, 383,069.40 and 128,950.67 is: 193,545.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,221.72 : 383,069.40 = 128,950.67 : x
  2. Step 2: Convert to fraction form
    255,221.72/383,069.40 = 128,950.67/x
  3. Step 3: Cross multiply
    255,221.72x = 383,069.40 × 128,950.67
  4. Step 4: Simplify right side
    255,221.72x = 49,397,053,871.15
  5. Step 5: Solve for x
    x = 49,397,053,871.15/255,221.72
  6. Step 6: Final answer
    x = 193,545.65

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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.