Home / 345,511.72-518,341.37-120,879.48

Finding the Fourth Proportional to 345,511.72, 518,341.37 and 120,879.48

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Solution

The fourth proportional to 345,511.72, 518,341.37 and 120,879.48 is: 181,345.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,511.72 : 518,341.37 = 120,879.48 : x
  2. Step 2: Convert to fraction form
    345,511.72/518,341.37 = 120,879.48/x
  3. Step 3: Cross multiply
    345,511.72x = 518,341.37 × 120,879.48
  4. Step 4: Simplify right side
    345,511.72x = 62,656,834,663.69
  5. Step 5: Solve for x
    x = 62,656,834,663.69/345,511.72
  6. Step 6: Final answer
    x = 181,345.04

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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.