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Finding the Fourth Proportional to 70,696.80, 106,042.80 and 18,106.80

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Solution

The fourth proportional to 70,696.80, 106,042.80 and 18,106.80 is: 27,159.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,696.80 : 106,042.80 = 18,106.80 : x
  2. Step 2: Convert to fraction form
    70,696.80/106,042.80 = 18,106.80/x
  3. Step 3: Cross multiply
    70,696.80x = 106,042.80 × 18,106.80
  4. Step 4: Simplify right side
    70,696.80x = 1,920,095,771.04
  5. Step 5: Solve for x
    x = 1,920,095,771.04/70,696.80
  6. Step 6: Final answer
    x = 27,159.59

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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.