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Finding the Fourth Proportional to 144,879.70, 199,975.62 and 87,509.89

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Solution

The fourth proportional to 144,879.70, 199,975.62 and 87,509.89 is: 120,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,879.70 : 199,975.62 = 87,509.89 : x
  2. Step 2: Convert to fraction form
    144,879.70/199,975.62 = 87,509.89/x
  3. Step 3: Cross multiply
    144,879.70x = 199,975.62 × 87,509.89
  4. Step 4: Simplify right side
    144,879.70x = 17,499,844,508.88
  5. Step 5: Solve for x
    x = 17,499,844,508.88/144,879.70
  6. Step 6: Final answer
    x = 120,788.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.