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Finding the Fourth Proportional to 103,879.52, 155,763.83 and 53,909.30

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Solution

The fourth proportional to 103,879.52, 155,763.83 and 53,909.30 is: 80,835.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,879.52 : 155,763.83 = 53,909.30 : x
  2. Step 2: Convert to fraction form
    103,879.52/155,763.83 = 53,909.30/x
  3. Step 3: Cross multiply
    103,879.52x = 155,763.83 × 53,909.30
  4. Step 4: Simplify right side
    103,879.52x = 8,397,117,992.25
  5. Step 5: Solve for x
    x = 8,397,117,992.25/103,879.52
  6. Step 6: Final answer
    x = 80,835.17

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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.