Home / 78,988.26-109,003.68-47,175.78

Finding the Fourth Proportional to 78,988.26, 109,003.68 and 47,175.78

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Solution

The fourth proportional to 78,988.26, 109,003.68 and 47,175.78 is: 65,102.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.26 : 109,003.68 = 47,175.78 : x
  2. Step 2: Convert to fraction form
    78,988.26/109,003.68 = 47,175.78/x
  3. Step 3: Cross multiply
    78,988.26x = 109,003.68 × 47,175.78
  4. Step 4: Simplify right side
    78,988.26x = 5,142,333,626.87
  5. Step 5: Solve for x
    x = 5,142,333,626.87/78,988.26
  6. Step 6: Final answer
    x = 65,102.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.