Home / 130,768.80-195,764.40-78,151.20

Finding the Fourth Proportional to 130,768.80, 195,764.40 and 78,151.20

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Solution

The fourth proportional to 130,768.80, 195,764.40 and 78,151.20 is: 116,994.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,768.80 : 195,764.40 = 78,151.20 : x
  2. Step 2: Convert to fraction form
    130,768.80/195,764.40 = 78,151.20/x
  3. Step 3: Cross multiply
    130,768.80x = 195,764.40 × 78,151.20
  4. Step 4: Simplify right side
    130,768.80x = 15,299,222,777.28
  5. Step 5: Solve for x
    x = 15,299,222,777.28/130,768.80
  6. Step 6: Final answer
    x = 116,994.44

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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.