Home / 215,128.32-322,495.68-90,478.08

Finding the Fourth Proportional to 215,128.32, 322,495.68 and 90,478.08

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Solution

The fourth proportional to 215,128.32, 322,495.68 and 90,478.08 is: 135,634.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,128.32 : 322,495.68 = 90,478.08 : x
  2. Step 2: Convert to fraction form
    215,128.32/322,495.68 = 90,478.08/x
  3. Step 3: Cross multiply
    215,128.32x = 322,495.68 × 90,478.08
  4. Step 4: Simplify right side
    215,128.32x = 29,178,789,934.69
  5. Step 5: Solve for x
    x = 29,178,789,934.69/215,128.32
  6. Step 6: Final answer
    x = 135,634.35

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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.