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Finding the Fourth Proportional to 115,162.65, 172,353.81 and 70,817.49

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Solution

The fourth proportional to 115,162.65, 172,353.81 and 70,817.49 is: 105,986.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,162.65 : 172,353.81 = 70,817.49 : x
  2. Step 2: Convert to fraction form
    115,162.65/172,353.81 = 70,817.49/x
  3. Step 3: Cross multiply
    115,162.65x = 172,353.81 × 70,817.49
  4. Step 4: Simplify right side
    115,162.65x = 12,205,664,216.14
  5. Step 5: Solve for x
    x = 12,205,664,216.14/115,162.65
  6. Step 6: Final answer
    x = 105,986.31

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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.