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Finding the Fourth Proportional to 115,168.10, 158,859.23 and 79,295.81

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Solution

The fourth proportional to 115,168.10, 158,859.23 and 79,295.81 is: 109,378.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,168.10 : 158,859.23 = 79,295.81 : x
  2. Step 2: Convert to fraction form
    115,168.10/158,859.23 = 79,295.81/x
  3. Step 3: Cross multiply
    115,168.10x = 158,859.23 × 79,295.81
  4. Step 4: Simplify right side
    115,168.10x = 12,596,870,128.05
  5. Step 5: Solve for x
    x = 12,596,870,128.05/115,168.10
  6. Step 6: Final answer
    x = 109,378.12

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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.