Home / 130,968.78-180,738.18-74,380.56

Finding the Fourth Proportional to 130,968.78, 180,738.18 and 74,380.56

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Solution

The fourth proportional to 130,968.78, 180,738.18 and 74,380.56 is: 102,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,968.78 : 180,738.18 = 74,380.56 : x
  2. Step 2: Convert to fraction form
    130,968.78/180,738.18 = 74,380.56/x
  3. Step 3: Cross multiply
    130,968.78x = 180,738.18 × 74,380.56
  4. Step 4: Simplify right side
    130,968.78x = 13,443,407,041.78
  5. Step 5: Solve for x
    x = 13,443,407,041.78/130,968.78
  6. Step 6: Final answer
    x = 102,645.89

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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.