Home / 135,739.02-187,336.46-78,378.20

Finding the Fourth Proportional to 135,739.02, 187,336.46 and 78,378.20

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Solution

The fourth proportional to 135,739.02, 187,336.46 and 78,378.20 is: 108,171.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,739.02 : 187,336.46 = 78,378.20 : x
  2. Step 2: Convert to fraction form
    135,739.02/187,336.46 = 78,378.20/x
  3. Step 3: Cross multiply
    135,739.02x = 187,336.46 × 78,378.20
  4. Step 4: Simplify right side
    135,739.02x = 14,683,093,788.44
  5. Step 5: Solve for x
    x = 14,683,093,788.44/135,739.02
  6. Step 6: Final answer
    x = 108,171.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.