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Finding the Fourth Proportional to 145,391.91, 218,087.61 and 45,559.77

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Solution

The fourth proportional to 145,391.91, 218,087.61 and 45,559.77 is: 68,339.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,391.91 : 218,087.61 = 45,559.77 : x
  2. Step 2: Convert to fraction form
    145,391.91/218,087.61 = 45,559.77/x
  3. Step 3: Cross multiply
    145,391.91x = 218,087.61 × 45,559.77
  4. Step 4: Simplify right side
    145,391.91x = 9,936,021,351.45
  5. Step 5: Solve for x
    x = 9,936,021,351.45/145,391.91
  6. Step 6: Final answer
    x = 68,339.58

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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.