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Finding the Fourth Proportional to 78,955.88, 118,478.62 and 29,029.48

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Solution

The fourth proportional to 78,955.88, 118,478.62 and 29,029.48 is: 43,560.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,955.88 : 118,478.62 = 29,029.48 : x
  2. Step 2: Convert to fraction form
    78,955.88/118,478.62 = 29,029.48/x
  3. Step 3: Cross multiply
    78,955.88x = 118,478.62 × 29,029.48
  4. Step 4: Simplify right side
    78,955.88x = 3,439,372,729.72
  5. Step 5: Solve for x
    x = 3,439,372,729.72/78,955.88
  6. Step 6: Final answer
    x = 43,560.69

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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.