Home / 78,408.14-117,575.15-30,399.21

Finding the Fourth Proportional to 78,408.14, 117,575.15 and 30,399.21

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Solution

The fourth proportional to 78,408.14, 117,575.15 and 30,399.21 is: 45,584.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,408.14 : 117,575.15 = 30,399.21 : x
  2. Step 2: Convert to fraction form
    78,408.14/117,575.15 = 30,399.21/x
  3. Step 3: Cross multiply
    78,408.14x = 117,575.15 × 30,399.21
  4. Step 4: Simplify right side
    78,408.14x = 3,574,191,523.64
  5. Step 5: Solve for x
    x = 3,574,191,523.64/78,408.14
  6. Step 6: Final answer
    x = 45,584.45

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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.