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Finding the Fourth Proportional to 28,085,429.60, 39,372,685.60 and 28,085,429.60

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Solution

The fourth proportional to 28,085,429.60, 39,372,685.60 and 28,085,429.60 is: 39,372,685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,429.60 : 39,372,685.60 = 28,085,429.60 : x
  2. Step 2: Convert to fraction form
    28,085,429.60/39,372,685.60 = 28,085,429.60/x
  3. Step 3: Cross multiply
    28,085,429.60x = 39,372,685.60 × 28,085,429.60
  4. Step 4: Simplify right side
    28,085,429.60x = 1,105,798,789,581,733.88
  5. Step 5: Solve for x
    x = 1,105,798,789,581,733.88/28,085,429.60
  6. Step 6: Final answer
    x = 39,372,685.60

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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.