Home / 80,357.13-120,511.93-30,400.17

Finding the Fourth Proportional to 80,357.13, 120,511.93 and 30,400.17

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Solution

The fourth proportional to 80,357.13, 120,511.93 and 30,400.17 is: 45,591.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,357.13 : 120,511.93 = 30,400.17 : x
  2. Step 2: Convert to fraction form
    80,357.13/120,511.93 = 30,400.17/x
  3. Step 3: Cross multiply
    80,357.13x = 120,511.93 × 30,400.17
  4. Step 4: Simplify right side
    80,357.13x = 3,663,583,159.03
  5. Step 5: Solve for x
    x = 3,663,583,159.03/80,357.13
  6. Step 6: Final answer
    x = 45,591.26

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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.