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Finding the Fourth Proportional to 111,367.90, 153,696.45 and 63,636.63

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Solution

The fourth proportional to 111,367.90, 153,696.45 and 63,636.63 is: 87,823.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,367.90 : 153,696.45 = 63,636.63 : x
  2. Step 2: Convert to fraction form
    111,367.90/153,696.45 = 63,636.63/x
  3. Step 3: Cross multiply
    111,367.90x = 153,696.45 × 63,636.63
  4. Step 4: Simplify right side
    111,367.90x = 9,780,724,120.96
  5. Step 5: Solve for x
    x = 9,780,724,120.96/111,367.90
  6. Step 6: Final answer
    x = 87,823.55

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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.