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Finding the Fourth Proportional to 115,172.16, 158,942.99 and 67,440.88

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Solution

The fourth proportional to 115,172.16, 158,942.99 and 67,440.88 is: 93,071.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,172.16 : 158,942.99 = 67,440.88 : x
  2. Step 2: Convert to fraction form
    115,172.16/158,942.99 = 67,440.88/x
  3. Step 3: Cross multiply
    115,172.16x = 158,942.99 × 67,440.88
  4. Step 4: Simplify right side
    115,172.16x = 10,719,255,115.43
  5. Step 5: Solve for x
    x = 10,719,255,115.43/115,172.16
  6. Step 6: Final answer
    x = 93,071.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.