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Finding the Fourth Proportional to 143,511.54, 215,080.12 and 89,453.89

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Solution

The fourth proportional to 143,511.54, 215,080.12 and 89,453.89 is: 134,064.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,511.54 : 215,080.12 = 89,453.89 : x
  2. Step 2: Convert to fraction form
    143,511.54/215,080.12 = 89,453.89/x
  3. Step 3: Cross multiply
    143,511.54x = 215,080.12 × 89,453.89
  4. Step 4: Simplify right side
    143,511.54x = 19,239,753,395.67
  5. Step 5: Solve for x
    x = 19,239,753,395.67/143,511.54
  6. Step 6: Final answer
    x = 134,064.16

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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.