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Finding the Fourth Proportional to 117,759.10, 162,450.48 and 69,978.64

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Solution

The fourth proportional to 117,759.10, 162,450.48 and 69,978.64 is: 96,536.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,759.10 : 162,450.48 = 69,978.64 : x
  2. Step 2: Convert to fraction form
    117,759.10/162,450.48 = 69,978.64/x
  3. Step 3: Cross multiply
    117,759.10x = 162,450.48 × 69,978.64
  4. Step 4: Simplify right side
    117,759.10x = 11,368,063,657.75
  5. Step 5: Solve for x
    x = 11,368,063,657.75/117,759.10
  6. Step 6: Final answer
    x = 96,536.60

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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.