Home / 129,031.28-193,537.20-76,773.36

Finding the Fourth Proportional to 129,031.28, 193,537.20 and 76,773.36

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Solution

The fourth proportional to 129,031.28, 193,537.20 and 76,773.36 is: 115,154.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,031.28 : 193,537.20 = 76,773.36 : x
  2. Step 2: Convert to fraction form
    129,031.28/193,537.20 = 76,773.36/x
  3. Step 3: Cross multiply
    129,031.28x = 193,537.20 × 76,773.36
  4. Step 4: Simplify right side
    129,031.28x = 14,858,501,128.99
  5. Step 5: Solve for x
    x = 14,858,501,128.99/129,031.28
  6. Step 6: Final answer
    x = 115,154.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.