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Finding the Fourth Proportional to 28,188,214.90, 39,378,470.30 and 28,188,214.90

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Solution

The fourth proportional to 28,188,214.90, 39,378,470.30 and 28,188,214.90 is: 39,378,470.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188,214.90 : 39,378,470.30 = 28,188,214.90 : x
  2. Step 2: Convert to fraction form
    28,188,214.90/39,378,470.30 = 28,188,214.90/x
  3. Step 3: Cross multiply
    28,188,214.90x = 39,378,470.30 × 28,188,214.90
  4. Step 4: Simplify right side
    28,188,214.90x = 1,110,008,783,249,667.38
  5. Step 5: Solve for x
    x = 1,110,008,783,249,667.38/28,188,214.90
  6. Step 6: Final answer
    x = 39,378,470.30

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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.