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Finding the Fourth Proportional to 77,079.88, 115,619.88 and 50,448.40

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Solution

The fourth proportional to 77,079.88, 115,619.88 and 50,448.40 is: 75,672.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,079.88 : 115,619.88 = 50,448.40 : x
  2. Step 2: Convert to fraction form
    77,079.88/115,619.88 = 50,448.40/x
  3. Step 3: Cross multiply
    77,079.88x = 115,619.88 × 50,448.40
  4. Step 4: Simplify right side
    77,079.88x = 5,832,837,954.19
  5. Step 5: Solve for x
    x = 5,832,837,954.19/77,079.88
  6. Step 6: Final answer
    x = 75,672.64

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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.