Home / 345,819.85-518,775.13-135,430.45

Finding the Fourth Proportional to 345,819.85, 518,775.13 and 135,430.45

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Solution

The fourth proportional to 345,819.85, 518,775.13 and 135,430.45 is: 203,163.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,819.85 : 518,775.13 = 135,430.45 : x
  2. Step 2: Convert to fraction form
    345,819.85/518,775.13 = 135,430.45/x
  3. Step 3: Cross multiply
    345,819.85x = 518,775.13 × 135,430.45
  4. Step 4: Simplify right side
    345,819.85x = 70,257,948,177.06
  5. Step 5: Solve for x
    x = 70,257,948,177.06/345,819.85
  6. Step 6: Final answer
    x = 203,163.44

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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.