Home / 57,742.28-79,640.16-39,867.20

Finding the Fourth Proportional to 57,742.28, 79,640.16 and 39,867.20

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Solution

The fourth proportional to 57,742.28, 79,640.16 and 39,867.20 is: 54,986.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,742.28 : 79,640.16 = 39,867.20 : x
  2. Step 2: Convert to fraction form
    57,742.28/79,640.16 = 39,867.20/x
  3. Step 3: Cross multiply
    57,742.28x = 79,640.16 × 39,867.20
  4. Step 4: Simplify right side
    57,742.28x = 3,175,030,186.75
  5. Step 5: Solve for x
    x = 3,175,030,186.75/57,742.28
  6. Step 6: Final answer
    x = 54,986.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.