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Finding the Fourth Proportional to 115,168.65, 172,362.81 and 70,823.49

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Solution

The fourth proportional to 115,168.65, 172,362.81 and 70,823.49 is: 105,995.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,168.65 : 172,362.81 = 70,823.49 : x
  2. Step 2: Convert to fraction form
    115,168.65/172,362.81 = 70,823.49/x
  3. Step 3: Cross multiply
    115,168.65x = 172,362.81 × 70,823.49
  4. Step 4: Simplify right side
    115,168.65x = 12,207,335,750.41
  5. Step 5: Solve for x
    x = 12,207,335,750.41/115,168.65
  6. Step 6: Final answer
    x = 105,995.30

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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.