Home / 81,220.12-121,815.28-36,836.20

Finding the Fourth Proportional to 81,220.12, 121,815.28 and 36,836.20

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Solution

The fourth proportional to 81,220.12, 121,815.28 and 36,836.20 is: 55,247.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220.12 : 121,815.28 = 36,836.20 : x
  2. Step 2: Convert to fraction form
    81,220.12/121,815.28 = 36,836.20/x
  3. Step 3: Cross multiply
    81,220.12x = 121,815.28 × 36,836.20
  4. Step 4: Simplify right side
    81,220.12x = 4,487,212,017.14
  5. Step 5: Solve for x
    x = 4,487,212,017.14/81,220.12
  6. Step 6: Final answer
    x = 55,247.54

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1.5x scale

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.