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Finding the Fourth Proportional to 312,499.46, 468,776.90 and 87,861.87

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Solution

The fourth proportional to 312,499.46, 468,776.90 and 87,861.87 is: 131,800.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,499.46 : 468,776.90 = 87,861.87 : x
  2. Step 2: Convert to fraction form
    312,499.46/468,776.90 = 87,861.87/x
  3. Step 3: Cross multiply
    312,499.46x = 468,776.90 × 87,861.87
  4. Step 4: Simplify right side
    312,499.46x = 41,187,615,266.46
  5. Step 5: Solve for x
    x = 41,187,615,266.46/312,499.46
  6. Step 6: Final answer
    x = 131,800.60

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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.