Home / 345,829.79-518,790.05-135,440.39

Finding the Fourth Proportional to 345,829.79, 518,790.05 and 135,440.39

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Solution

The fourth proportional to 345,829.79, 518,790.05 and 135,440.39 is: 203,178.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,829.79 : 518,790.05 = 135,440.39 : x
  2. Step 2: Convert to fraction form
    345,829.79/518,790.05 = 135,440.39/x
  3. Step 3: Cross multiply
    345,829.79x = 518,790.05 × 135,440.39
  4. Step 4: Simplify right side
    345,829.79x = 70,265,123,428.97
  5. Step 5: Solve for x
    x = 70,265,123,428.97/345,829.79
  6. Step 6: Final answer
    x = 203,178.35

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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.