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Finding the Fourth Proportional to 312,353.11, 468,548.79 and 87,731.83

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Solution

The fourth proportional to 312,353.11, 468,548.79 and 87,731.83 is: 131,603.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,353.11 : 468,548.79 = 87,731.83 : x
  2. Step 2: Convert to fraction form
    312,353.11/468,548.79 = 87,731.83/x
  3. Step 3: Cross multiply
    312,353.11x = 468,548.79 × 87,731.83
  4. Step 4: Simplify right side
    312,353.11x = 41,106,642,790.99
  5. Step 5: Solve for x
    x = 41,106,642,790.99/312,353.11
  6. Step 6: Final answer
    x = 131,603.12

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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.