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Finding the Fourth Proportional to 77,028.40, 115,559.40 and 43,764.40

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Solution

The fourth proportional to 77,028.40, 115,559.40 and 43,764.40 is: 65,656.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,028.40 : 115,559.40 = 43,764.40 : x
  2. Step 2: Convert to fraction form
    77,028.40/115,559.40 = 43,764.40/x
  3. Step 3: Cross multiply
    77,028.40x = 115,559.40 × 43,764.40
  4. Step 4: Simplify right side
    77,028.40x = 5,057,387,805.36
  5. Step 5: Solve for x
    x = 5,057,387,805.36/77,028.40
  6. Step 6: Final answer
    x = 65,656.15

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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.