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Finding the Fourth Proportional to 45,900.88, 68,469.86 and 45,139.64

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Solution

The fourth proportional to 45,900.88, 68,469.86 and 45,139.64 is: 67,334.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,900.88 : 68,469.86 = 45,139.64 : x
  2. Step 2: Convert to fraction form
    45,900.88/68,469.86 = 45,139.64/x
  3. Step 3: Cross multiply
    45,900.88x = 68,469.86 × 45,139.64
  4. Step 4: Simplify right side
    45,900.88x = 3,090,704,601.75
  5. Step 5: Solve for x
    x = 3,090,704,601.75/45,900.88
  6. Step 6: Final answer
    x = 67,334.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.