Home / 79,128.39-109,199.64-43,321.74

Finding the Fourth Proportional to 79,128.39, 109,199.64 and 43,321.74

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Solution

The fourth proportional to 79,128.39, 109,199.64 and 43,321.74 is: 59,785.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.39 : 109,199.64 = 43,321.74 : x
  2. Step 2: Convert to fraction form
    79,128.39/109,199.64 = 43,321.74/x
  3. Step 3: Cross multiply
    79,128.39x = 109,199.64 × 43,321.74
  4. Step 4: Simplify right side
    79,128.39x = 4,730,718,165.13
  5. Step 5: Solve for x
    x = 4,730,718,165.13/79,128.39
  6. Step 6: Final answer
    x = 59,785.34

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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.