Home / 205,118.71-307,655.03-78,670.25

Finding the Fourth Proportional to 205,118.71, 307,655.03 and 78,670.25

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Solution

The fourth proportional to 205,118.71, 307,655.03 and 78,670.25 is: 117,996.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,118.71 : 307,655.03 = 78,670.25 : x
  2. Step 2: Convert to fraction form
    205,118.71/307,655.03 = 78,670.25/x
  3. Step 3: Cross multiply
    205,118.71x = 307,655.03 × 78,670.25
  4. Step 4: Simplify right side
    205,118.71x = 24,203,299,224.00
  5. Step 5: Solve for x
    x = 24,203,299,224.00/205,118.71
  6. Step 6: Final answer
    x = 117,996.54

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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.