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Finding the Fourth Proportional to 143,395.80, 215,093.70 and 120,586.20

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Solution

The fourth proportional to 143,395.80, 215,093.70 and 120,586.20 is: 180,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,395.80 : 215,093.70 = 120,586.20 : x
  2. Step 2: Convert to fraction form
    143,395.80/215,093.70 = 120,586.20/x
  3. Step 3: Cross multiply
    143,395.80x = 215,093.70 × 120,586.20
  4. Step 4: Simplify right side
    143,395.80x = 25,937,331,926.94
  5. Step 5: Solve for x
    x = 25,937,331,926.94/143,395.80
  6. Step 6: Final answer
    x = 180,879.30

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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.