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Finding the Fourth Proportional to 57,240.40, 85,860.60 and 15,120.40

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Solution

The fourth proportional to 57,240.40, 85,860.60 and 15,120.40 is: 22,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,240.40 : 85,860.60 = 15,120.40 : x
  2. Step 2: Convert to fraction form
    57,240.40/85,860.60 = 15,120.40/x
  3. Step 3: Cross multiply
    57,240.40x = 85,860.60 × 15,120.40
  4. Step 4: Simplify right side
    57,240.40x = 1,298,246,616.24
  5. Step 5: Solve for x
    x = 1,298,246,616.24/57,240.40
  6. Step 6: Final answer
    x = 22,680.60

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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.