Home / 345,399.89-518,146.98-120,708.18

Finding the Fourth Proportional to 345,399.89, 518,146.98 and 120,708.18

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Solution

The fourth proportional to 345,399.89, 518,146.98 and 120,708.18 is: 181,078.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,399.89 : 518,146.98 = 120,708.18 : x
  2. Step 2: Convert to fraction form
    345,399.89/518,146.98 = 120,708.18/x
  3. Step 3: Cross multiply
    345,399.89x = 518,146.98 × 120,708.18
  4. Step 4: Simplify right side
    345,399.89x = 62,544,578,928.30
  5. Step 5: Solve for x
    x = 62,544,578,928.30/345,399.89
  6. Step 6: Final answer
    x = 181,078.75

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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.