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Finding the Fourth Proportional to 120,711.80, 180,995.70 and 73,998.20

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Solution

The fourth proportional to 120,711.80, 180,995.70 and 73,998.20 is: 110,953.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,711.80 : 180,995.70 = 73,998.20 : x
  2. Step 2: Convert to fraction form
    120,711.80/180,995.70 = 73,998.20/x
  3. Step 3: Cross multiply
    120,711.80x = 180,995.70 × 73,998.20
  4. Step 4: Simplify right side
    120,711.80x = 13,393,356,007.74
  5. Step 5: Solve for x
    x = 13,393,356,007.74/120,711.80
  6. Step 6: Final answer
    x = 110,953.16

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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.