Home / 100,464.08-138,640.20-58,021.52

Finding the Fourth Proportional to 100,464.08, 138,640.20 and 58,021.52

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Solution

The fourth proportional to 100,464.08, 138,640.20 and 58,021.52 is: 80,069.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,464.08 : 138,640.20 = 58,021.52 : x
  2. Step 2: Convert to fraction form
    100,464.08/138,640.20 = 58,021.52/x
  3. Step 3: Cross multiply
    100,464.08x = 138,640.20 × 58,021.52
  4. Step 4: Simplify right side
    100,464.08x = 8,044,115,137.10
  5. Step 5: Solve for x
    x = 8,044,115,137.10/100,464.08
  6. Step 6: Final answer
    x = 80,069.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.