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Finding the Fourth Proportional to 78,862.45, 118,404.39 and 75,291.70

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Solution

The fourth proportional to 78,862.45, 118,404.39 and 75,291.70 is: 113,043.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,862.45 : 118,404.39 = 75,291.70 : x
  2. Step 2: Convert to fraction form
    78,862.45/118,404.39 = 75,291.70/x
  3. Step 3: Cross multiply
    78,862.45x = 118,404.39 × 75,291.70
  4. Step 4: Simplify right side
    78,862.45x = 8,914,867,810.56
  5. Step 5: Solve for x
    x = 8,914,867,810.56/78,862.45
  6. Step 6: Final answer
    x = 113,043.25

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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.