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Finding the Fourth Proportional to 312,500.91, 468,779.06 and 87,863.31

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Solution

The fourth proportional to 312,500.91, 468,779.06 and 87,863.31 is: 131,802.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,500.91 : 468,779.06 = 87,863.31 : x
  2. Step 2: Convert to fraction form
    312,500.91/468,779.06 = 87,863.31/x
  3. Step 3: Cross multiply
    312,500.91x = 468,779.06 × 87,863.31
  4. Step 4: Simplify right side
    312,500.91x = 41,188,479,870.29
  5. Step 5: Solve for x
    x = 41,188,479,870.29/312,500.91
  6. Step 6: Final answer
    x = 131,802.75

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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.