Home / 66,914.28-100,389.78-54,403.20

Finding the Fourth Proportional to 66,914.28, 100,389.78 and 54,403.20

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Solution

The fourth proportional to 66,914.28, 100,389.78 and 54,403.20 is: 81,619.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,914.28 : 100,389.78 = 54,403.20 : x
  2. Step 2: Convert to fraction form
    66,914.28/100,389.78 = 54,403.20/x
  3. Step 3: Cross multiply
    66,914.28x = 100,389.78 × 54,403.20
  4. Step 4: Simplify right side
    66,914.28x = 5,461,525,279.30
  5. Step 5: Solve for x
    x = 5,461,525,279.30/66,914.28
  6. Step 6: Final answer
    x = 81,619.73

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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.