Home / 129,165.11-178,242.27-71,804.30

Finding the Fourth Proportional to 129,165.11, 178,242.27 and 71,804.30

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Solution

The fourth proportional to 129,165.11, 178,242.27 and 71,804.30 is: 99,086.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,165.11 : 178,242.27 = 71,804.30 : x
  2. Step 2: Convert to fraction form
    129,165.11/178,242.27 = 71,804.30/x
  3. Step 3: Cross multiply
    129,165.11x = 178,242.27 × 71,804.30
  4. Step 4: Simplify right side
    129,165.11x = 12,798,560,536.55
  5. Step 5: Solve for x
    x = 12,798,560,536.55/129,165.11
  6. Step 6: Final answer
    x = 99,086.83

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1.5x scale

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.