Home / 219,493.32-329,013.99-86,319.60

Finding the Fourth Proportional to 219,493.32, 329,013.99 and 86,319.60

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Solution

The fourth proportional to 219,493.32, 329,013.99 and 86,319.60 is: 129,390.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,493.32 : 329,013.99 = 86,319.60 : x
  2. Step 2: Convert to fraction form
    219,493.32/329,013.99 = 86,319.60/x
  3. Step 3: Cross multiply
    219,493.32x = 329,013.99 × 86,319.60
  4. Step 4: Simplify right side
    219,493.32x = 28,400,356,011.20
  5. Step 5: Solve for x
    x = 28,400,356,011.20/219,493.32
  6. Step 6: Final answer
    x = 129,390.53

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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.