Home / 79,128.42-109,199.14-43,318.32

Finding the Fourth Proportional to 79,128.42, 109,199.14 and 43,318.32

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Solution

The fourth proportional to 79,128.42, 109,199.14 and 43,318.32 is: 59,780.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.42 : 109,199.14 = 43,318.32 : x
  2. Step 2: Convert to fraction form
    79,128.42/109,199.14 = 43,318.32/x
  3. Step 3: Cross multiply
    79,128.42x = 109,199.14 × 43,318.32
  4. Step 4: Simplify right side
    79,128.42x = 4,730,322,772.45
  5. Step 5: Solve for x
    x = 4,730,322,772.45/79,128.42
  6. Step 6: Final answer
    x = 59,780.33

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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.