Home / 129,170.46-178,276.65-75,455.31

Finding the Fourth Proportional to 129,170.46, 178,276.65 and 75,455.31

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Solution

The fourth proportional to 129,170.46, 178,276.65 and 75,455.31 is: 104,140.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,170.46 : 178,276.65 = 75,455.31 : x
  2. Step 2: Convert to fraction form
    129,170.46/178,276.65 = 75,455.31/x
  3. Step 3: Cross multiply
    129,170.46x = 178,276.65 × 75,455.31
  4. Step 4: Simplify right side
    129,170.46x = 13,451,919,891.51
  5. Step 5: Solve for x
    x = 13,451,919,891.51/129,170.46
  6. Step 6: Final answer
    x = 104,140.84

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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.