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Finding the Fourth Proportional to 78,795.64, 118,212.90 and 26,205.58

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Solution

The fourth proportional to 78,795.64, 118,212.90 and 26,205.58 is: 39,314.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,795.64 : 118,212.90 = 26,205.58 : x
  2. Step 2: Convert to fraction form
    78,795.64/118,212.90 = 26,205.58/x
  3. Step 3: Cross multiply
    78,795.64x = 118,212.90 × 26,205.58
  4. Step 4: Simplify right side
    78,795.64x = 3,097,837,607.98
  5. Step 5: Solve for x
    x = 3,097,837,607.98/78,795.64
  6. Step 6: Final answer
    x = 39,314.84

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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.