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Finding the Fourth Proportional to 80,980.61, 111,753.41 and 45,169.70

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Solution

The fourth proportional to 80,980.61, 111,753.41 and 45,169.70 is: 62,334.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,980.61 : 111,753.41 = 45,169.70 : x
  2. Step 2: Convert to fraction form
    80,980.61/111,753.41 = 45,169.70/x
  3. Step 3: Cross multiply
    80,980.61x = 111,753.41 × 45,169.70
  4. Step 4: Simplify right side
    80,980.61x = 5,047,867,219.06
  5. Step 5: Solve for x
    x = 5,047,867,219.06/80,980.61
  6. Step 6: Final answer
    x = 62,334.27

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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.