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Finding the Fourth Proportional to 78,759.60, 118,139.40 and 41,305.20

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Solution

The fourth proportional to 78,759.60, 118,139.40 and 41,305.20 is: 61,957.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,759.60 : 118,139.40 = 41,305.20 : x
  2. Step 2: Convert to fraction form
    78,759.60/118,139.40 = 41,305.20/x
  3. Step 3: Cross multiply
    78,759.60x = 118,139.40 × 41,305.20
  4. Step 4: Simplify right side
    78,759.60x = 4,879,771,544.88
  5. Step 5: Solve for x
    x = 4,879,771,544.88/78,759.60
  6. Step 6: Final answer
    x = 61,957.80

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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.