Home / 78,249.11-107,983.60-42,438.94

Finding the Fourth Proportional to 78,249.11, 107,983.60 and 42,438.94

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Solution

The fourth proportional to 78,249.11, 107,983.60 and 42,438.94 is: 58,565.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,249.11 : 107,983.60 = 42,438.94 : x
  2. Step 2: Convert to fraction form
    78,249.11/107,983.60 = 42,438.94/x
  3. Step 3: Cross multiply
    78,249.11x = 107,983.60 × 42,438.94
  4. Step 4: Simplify right side
    78,249.11x = 4,582,709,145.33
  5. Step 5: Solve for x
    x = 4,582,709,145.33/78,249.11
  6. Step 6: Final answer
    x = 58,565.64

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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.