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Finding the Fourth Proportional to 89,813.30, 134,553.90 and 52,391.30

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Solution

The fourth proportional to 89,813.30, 134,553.90 and 52,391.30 is: 78,490.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,813.30 : 134,553.90 = 52,391.30 : x
  2. Step 2: Convert to fraction form
    89,813.30/134,553.90 = 52,391.30/x
  3. Step 3: Cross multiply
    89,813.30x = 134,553.90 × 52,391.30
  4. Step 4: Simplify right side
    89,813.30x = 7,049,453,741.07
  5. Step 5: Solve for x
    x = 7,049,453,741.07/89,813.30
  6. Step 6: Final answer
    x = 78,490.09

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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.