Home / 143,834.20-215,488.85-80,323.72

Finding the Fourth Proportional to 143,834.20, 215,488.85 and 80,323.72

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Solution

The fourth proportional to 143,834.20, 215,488.85 and 80,323.72 is: 120,339.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,834.20 : 215,488.85 = 80,323.72 : x
  2. Step 2: Convert to fraction form
    143,834.20/215,488.85 = 80,323.72/x
  3. Step 3: Cross multiply
    143,834.20x = 215,488.85 × 80,323.72
  4. Step 4: Simplify right side
    143,834.20x = 17,308,864,973.08
  5. Step 5: Solve for x
    x = 17,308,864,973.08/143,834.20
  6. Step 6: Final answer
    x = 120,339.01

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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.