Home / 127,833.20-191,531.10-81,031.40

Finding the Fourth Proportional to 127,833.20, 191,531.10 and 81,031.40

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Solution

The fourth proportional to 127,833.20, 191,531.10 and 81,031.40 is: 121,408.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,833.20 : 191,531.10 = 81,031.40 : x
  2. Step 2: Convert to fraction form
    127,833.20/191,531.10 = 81,031.40/x
  3. Step 3: Cross multiply
    127,833.20x = 191,531.10 × 81,031.40
  4. Step 4: Simplify right side
    127,833.20x = 15,520,033,176.54
  5. Step 5: Solve for x
    x = 15,520,033,176.54/127,833.20
  6. Step 6: Final answer
    x = 121,408.47

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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.