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Finding the Fourth Proportional to 78,988.50, 118,529.51 and 29,103.72

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Solution

The fourth proportional to 78,988.50, 118,529.51 and 29,103.72 is: 43,672.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.50 : 118,529.51 = 29,103.72 : x
  2. Step 2: Convert to fraction form
    78,988.50/118,529.51 = 29,103.72/x
  3. Step 3: Cross multiply
    78,988.50x = 118,529.51 × 29,103.72
  4. Step 4: Simplify right side
    78,988.50x = 3,449,649,525.26
  5. Step 5: Solve for x
    x = 3,449,649,525.26/78,988.50
  6. Step 6: Final answer
    x = 43,672.81

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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.