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Finding the Fourth Proportional to 312,579.74, 468,815.28 and 87,886.86

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Solution

The fourth proportional to 312,579.74, 468,815.28 and 87,886.86 is: 131,815.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,579.74 : 468,815.28 = 87,886.86 : x
  2. Step 2: Convert to fraction form
    312,579.74/468,815.28 = 87,886.86/x
  3. Step 3: Cross multiply
    312,579.74x = 468,815.28 × 87,886.86
  4. Step 4: Simplify right side
    312,579.74x = 41,202,702,879.22
  5. Step 5: Solve for x
    x = 41,202,702,879.22/312,579.74
  6. Step 6: Final answer
    x = 131,815.01

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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.