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Finding the Fourth Proportional to 113,420.80, 170,131.20 and 74,022.40

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Solution

The fourth proportional to 113,420.80, 170,131.20 and 74,022.40 is: 111,033.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,420.80 : 170,131.20 = 74,022.40 : x
  2. Step 2: Convert to fraction form
    113,420.80/170,131.20 = 74,022.40/x
  3. Step 3: Cross multiply
    113,420.80x = 170,131.20 × 74,022.40
  4. Step 4: Simplify right side
    113,420.80x = 12,593,519,738.88
  5. Step 5: Solve for x
    x = 12,593,519,738.88/113,420.80
  6. Step 6: Final answer
    x = 111,033.60

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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.