Home / 42,078.34-63,072.24-20,976.76

Finding the Fourth Proportional to 42,078.34, 63,072.24 and 20,976.76

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Solution

The fourth proportional to 42,078.34, 63,072.24 and 20,976.76 is: 31,442.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,078.34 : 63,072.24 = 20,976.76 : x
  2. Step 2: Convert to fraction form
    42,078.34/63,072.24 = 20,976.76/x
  3. Step 3: Cross multiply
    42,078.34x = 63,072.24 × 20,976.76
  4. Step 4: Simplify right side
    42,078.34x = 1,323,051,241.14
  5. Step 5: Solve for x
    x = 1,323,051,241.14/42,078.34
  6. Step 6: Final answer
    x = 31,442.57

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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.