Home / 77,188.24-115,784.32-21,028.80

Finding the Fourth Proportional to 77,188.24, 115,784.32 and 21,028.80

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Solution

The fourth proportional to 77,188.24, 115,784.32 and 21,028.80 is: 31,543.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,188.24 : 115,784.32 = 21,028.80 : x
  2. Step 2: Convert to fraction form
    77,188.24/115,784.32 = 21,028.80/x
  3. Step 3: Cross multiply
    77,188.24x = 115,784.32 × 21,028.80
  4. Step 4: Simplify right side
    77,188.24x = 2,434,805,308.42
  5. Step 5: Solve for x
    x = 2,434,805,308.42/77,188.24
  6. Step 6: Final answer
    x = 31,543.73

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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.