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Finding the Fourth Proportional to 312,387.91, 468,600.03 and 87,765.86

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Solution

The fourth proportional to 312,387.91, 468,600.03 and 87,765.86 is: 131,653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,387.91 : 468,600.03 = 87,765.86 : x
  2. Step 2: Convert to fraction form
    312,387.91/468,600.03 = 87,765.86/x
  3. Step 3: Cross multiply
    312,387.91x = 468,600.03 × 87,765.86
  4. Step 4: Simplify right side
    312,387.91x = 41,127,082,285.98
  5. Step 5: Solve for x
    x = 41,127,082,285.98/312,387.91
  6. Step 6: Final answer
    x = 131,653.89

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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.