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Finding the Fourth Proportional to 28,188,211.65, 39,378,465.75 and 28,188,211.65

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Solution

The fourth proportional to 28,188,211.65, 39,378,465.75 and 28,188,211.65 is: 39,378,465.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188,211.65 : 39,378,465.75 = 28,188,211.65 : x
  2. Step 2: Convert to fraction form
    28,188,211.65/39,378,465.75 = 28,188,211.65/x
  3. Step 3: Cross multiply
    28,188,211.65x = 39,378,465.75 × 28,188,211.65
  4. Step 4: Simplify right side
    28,188,211.65x = 1,110,008,527,013,275.88
  5. Step 5: Solve for x
    x = 1,110,008,527,013,275.88/28,188,211.65
  6. Step 6: Final answer
    x = 39,378,465.75

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.