Home / 81,074.36-121,528.86-45,939.80

Finding the Fourth Proportional to 81,074.36, 121,528.86 and 45,939.80

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Solution

The fourth proportional to 81,074.36, 121,528.86 and 45,939.80 is: 68,862.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,074.36 : 121,528.86 = 45,939.80 : x
  2. Step 2: Convert to fraction form
    81,074.36/121,528.86 = 45,939.80/x
  3. Step 3: Cross multiply
    81,074.36x = 121,528.86 × 45,939.80
  4. Step 4: Simplify right side
    81,074.36x = 5,583,011,522.63
  5. Step 5: Solve for x
    x = 5,583,011,522.63/81,074.36
  6. Step 6: Final answer
    x = 68,862.85

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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.