Home / 78,796.20-118,271.10-39,397.80

Finding the Fourth Proportional to 78,796.20, 118,271.10 and 39,397.80

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Solution

The fourth proportional to 78,796.20, 118,271.10 and 39,397.80 is: 59,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,796.20 : 118,271.10 = 39,397.80 : x
  2. Step 2: Convert to fraction form
    78,796.20/118,271.10 = 39,397.80/x
  3. Step 3: Cross multiply
    78,796.20x = 118,271.10 × 39,397.80
  4. Step 4: Simplify right side
    78,796.20x = 4,659,621,143.58
  5. Step 5: Solve for x
    x = 4,659,621,143.58/78,796.20
  6. Step 6: Final answer
    x = 59,135.10

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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.