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Finding the Fourth Proportional to 115,319.46, 172,978.17 and 36,433.69

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Solution

The fourth proportional to 115,319.46, 172,978.17 and 36,433.69 is: 54,650.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,319.46 : 172,978.17 = 36,433.69 : x
  2. Step 2: Convert to fraction form
    115,319.46/172,978.17 = 36,433.69/x
  3. Step 3: Cross multiply
    115,319.46x = 172,978.17 × 36,433.69
  4. Step 4: Simplify right side
    115,319.46x = 6,302,232,453.48
  5. Step 5: Solve for x
    x = 6,302,232,453.48/115,319.46
  6. Step 6: Final answer
    x = 54,650.21

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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.