Home / 345,619.58-518,662.85-120,981.87

Finding the Fourth Proportional to 345,619.58, 518,662.85 and 120,981.87

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Solution

The fourth proportional to 345,619.58, 518,662.85 and 120,981.87 is: 181,554.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,619.58 : 518,662.85 = 120,981.87 : x
  2. Step 2: Convert to fraction form
    345,619.58/518,662.85 = 120,981.87/x
  3. Step 3: Cross multiply
    345,619.58x = 518,662.85 × 120,981.87
  4. Step 4: Simplify right side
    345,619.58x = 62,748,800,887.62
  5. Step 5: Solve for x
    x = 62,748,800,887.62/345,619.58
  6. Step 6: Final answer
    x = 181,554.53

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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.