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Finding the Fourth Proportional to 78,833.52, 118,187.51 and 45,515.79

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Solution

The fourth proportional to 78,833.52, 118,187.51 and 45,515.79 is: 68,237.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,833.52 : 118,187.51 = 45,515.79 : x
  2. Step 2: Convert to fraction form
    78,833.52/118,187.51 = 45,515.79/x
  3. Step 3: Cross multiply
    78,833.52x = 118,187.51 × 45,515.79
  4. Step 4: Simplify right side
    78,833.52x = 5,379,397,658.20
  5. Step 5: Solve for x
    x = 5,379,397,658.20/78,833.52
  6. Step 6: Final answer
    x = 68,237.44

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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.