Home / 81,425.35-122,138.03-60,430.15

Finding the Fourth Proportional to 81,425.35, 122,138.03 and 60,430.15

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Solution

The fourth proportional to 81,425.35, 122,138.03 and 60,430.15 is: 90,645.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,425.35 : 122,138.03 = 60,430.15 : x
  2. Step 2: Convert to fraction form
    81,425.35/122,138.03 = 60,430.15/x
  3. Step 3: Cross multiply
    81,425.35x = 122,138.03 × 60,430.15
  4. Step 4: Simplify right side
    81,425.35x = 7,380,819,171.45
  5. Step 5: Solve for x
    x = 7,380,819,171.45/81,425.35
  6. Step 6: Final answer
    x = 90,645.23

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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.