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Finding the Fourth Proportional to 78,782.33, 118,118.13 and 28,855.94

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Solution

The fourth proportional to 78,782.33, 118,118.13 and 28,855.94 is: 43,263.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,782.33 : 118,118.13 = 28,855.94 : x
  2. Step 2: Convert to fraction form
    78,782.33/118,118.13 = 28,855.94/x
  3. Step 3: Cross multiply
    78,782.33x = 118,118.13 × 28,855.94
  4. Step 4: Simplify right side
    78,782.33x = 3,408,409,672.19
  5. Step 5: Solve for x
    x = 3,408,409,672.19/78,782.33
  6. Step 6: Final answer
    x = 43,263.63

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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.