Home / 130,739.60-195,655.80-78,186.80

Finding the Fourth Proportional to 130,739.60, 195,655.80 and 78,186.80

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Solution

The fourth proportional to 130,739.60, 195,655.80 and 78,186.80 is: 117,008.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,739.60 : 195,655.80 = 78,186.80 : x
  2. Step 2: Convert to fraction form
    130,739.60/195,655.80 = 78,186.80/x
  3. Step 3: Cross multiply
    130,739.60x = 195,655.80 × 78,186.80
  4. Step 4: Simplify right side
    130,739.60x = 15,297,700,903.44
  5. Step 5: Solve for x
    x = 15,297,700,903.44/130,739.60
  6. Step 6: Final answer
    x = 117,008.93

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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.