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Finding the Fourth Proportional to 115,136.70, 172,693.02 and 30,905.88

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Solution

The fourth proportional to 115,136.70, 172,693.02 and 30,905.88 is: 46,355.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,136.70 : 172,693.02 = 30,905.88 : x
  2. Step 2: Convert to fraction form
    115,136.70/172,693.02 = 30,905.88/x
  3. Step 3: Cross multiply
    115,136.70x = 172,693.02 × 30,905.88
  4. Step 4: Simplify right side
    115,136.70x = 5,337,229,752.96
  5. Step 5: Solve for x
    x = 5,337,229,752.96/115,136.70
  6. Step 6: Final answer
    x = 46,355.59

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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.