Home / 81,258.60-121,786.41-39,130.83

Finding the Fourth Proportional to 81,258.60, 121,786.41 and 39,130.83

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Solution

The fourth proportional to 81,258.60, 121,786.41 and 39,130.83 is: 58,647.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,258.60 : 121,786.41 = 39,130.83 : x
  2. Step 2: Convert to fraction form
    81,258.60/121,786.41 = 39,130.83/x
  3. Step 3: Cross multiply
    81,258.60x = 121,786.41 × 39,130.83
  4. Step 4: Simplify right side
    81,258.60x = 4,765,603,306.02
  5. Step 5: Solve for x
    x = 4,765,603,306.02/81,258.60
  6. Step 6: Final answer
    x = 58,647.37

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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.