Home / 143,421.05-215,034.51-80,284.76

Finding the Fourth Proportional to 143,421.05, 215,034.51 and 80,284.76

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Solution

The fourth proportional to 143,421.05, 215,034.51 and 80,284.76 is: 120,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,421.05 : 215,034.51 = 80,284.76 : x
  2. Step 2: Convert to fraction form
    143,421.05/215,034.51 = 80,284.76/x
  3. Step 3: Cross multiply
    143,421.05x = 215,034.51 × 80,284.76
  4. Step 4: Simplify right side
    143,421.05x = 17,263,994,027.07
  5. Step 5: Solve for x
    x = 17,263,994,027.07/143,421.05
  6. Step 6: Final answer
    x = 120,372.81

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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.