Home / 81,078.84-121,615.61-36,705.60

Finding the Fourth Proportional to 81,078.84, 121,615.61 and 36,705.60

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Solution

The fourth proportional to 81,078.84, 121,615.61 and 36,705.60 is: 55,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,078.84 : 121,615.61 = 36,705.60 : x
  2. Step 2: Convert to fraction form
    81,078.84/121,615.61 = 36,705.60/x
  3. Step 3: Cross multiply
    81,078.84x = 121,615.61 × 36,705.60
  4. Step 4: Simplify right side
    81,078.84x = 4,463,973,750.89
  5. Step 5: Solve for x
    x = 4,463,973,750.89/81,078.84
  6. Step 6: Final answer
    x = 55,057.20

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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.