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Finding the Fourth Proportional to 115,147.53, 172,647.48 and 79,509

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Solution

The fourth proportional to 115,147.53, 172,647.48 and 79,509 is: 119,212.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,147.53 : 172,647.48 = 79,509 : x
  2. Step 2: Convert to fraction form
    115,147.53/172,647.48 = 79,509/x
  3. Step 3: Cross multiply
    115,147.53x = 172,647.48 × 79,509
  4. Step 4: Simplify right side
    115,147.53x = 13,727,028,487.32
  5. Step 5: Solve for x
    x = 13,727,028,487.32/115,147.53
  6. Step 6: Final answer
    x = 119,212.53

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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.