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Finding the Fourth Proportional to 85,619.63, 118,155.51 and 47,893.88

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Solution

The fourth proportional to 85,619.63, 118,155.51 and 47,893.88 is: 66,093.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,619.63 : 118,155.51 = 47,893.88 : x
  2. Step 2: Convert to fraction form
    85,619.63/118,155.51 = 47,893.88/x
  3. Step 3: Cross multiply
    85,619.63x = 118,155.51 × 47,893.88
  4. Step 4: Simplify right side
    85,619.63x = 5,658,925,817.28
  5. Step 5: Solve for x
    x = 5,658,925,817.28/85,619.63
  6. Step 6: Final answer
    x = 66,093.79

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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.