Home / 345,681.72-518,478.84-135,467.28

Finding the Fourth Proportional to 345,681.72, 518,478.84 and 135,467.28

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Solution

The fourth proportional to 345,681.72, 518,478.84 and 135,467.28 is: 203,183.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,681.72 : 518,478.84 = 135,467.28 : x
  2. Step 2: Convert to fraction form
    345,681.72/518,478.84 = 135,467.28/x
  3. Step 3: Cross multiply
    345,681.72x = 518,478.84 × 135,467.28
  4. Step 4: Simplify right side
    345,681.72x = 70,236,918,192.36
  5. Step 5: Solve for x
    x = 70,236,918,192.36/345,681.72
  6. Step 6: Final answer
    x = 203,183.78

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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.