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Finding the Fourth Proportional to 113,393.20, 170,107.80 and 38,520.40

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Solution

The fourth proportional to 113,393.20, 170,107.80 and 38,520.40 is: 57,786.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,393.20 : 170,107.80 = 38,520.40 : x
  2. Step 2: Convert to fraction form
    113,393.20/170,107.80 = 38,520.40/x
  3. Step 3: Cross multiply
    113,393.20x = 170,107.80 × 38,520.40
  4. Step 4: Simplify right side
    113,393.20x = 6,552,620,499.12
  5. Step 5: Solve for x
    x = 6,552,620,499.12/113,393.20
  6. Step 6: Final answer
    x = 57,786.71

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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.