Home / 129,072.87-178,101.27-72,473.31

Finding the Fourth Proportional to 129,072.87, 178,101.27 and 72,473.31

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Solution

The fourth proportional to 129,072.87, 178,101.27 and 72,473.31 is: 100,002.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,072.87 : 178,101.27 = 72,473.31 : x
  2. Step 2: Convert to fraction form
    129,072.87/178,101.27 = 72,473.31/x
  3. Step 3: Cross multiply
    129,072.87x = 178,101.27 × 72,473.31
  4. Step 4: Simplify right side
    129,072.87x = 12,907,588,552.10
  5. Step 5: Solve for x
    x = 12,907,588,552.10/129,072.87
  6. Step 6: Final answer
    x = 100,002.34

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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.