Home / 280,630.12-387,139.62-161,329

Finding the Fourth Proportional to 280,630.12, 387,139.62 and 161,329

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Solution

The fourth proportional to 280,630.12, 387,139.62 and 161,329 is: 222,559.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,630.12 : 387,139.62 = 161,329 : x
  2. Step 2: Convert to fraction form
    280,630.12/387,139.62 = 161,329/x
  3. Step 3: Cross multiply
    280,630.12x = 387,139.62 × 161,329
  4. Step 4: Simplify right side
    280,630.12x = 62,456,847,754.98
  5. Step 5: Solve for x
    x = 62,456,847,754.98/280,630.12
  6. Step 6: Final answer
    x = 222,559.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.