Home / 127,839.20-191,540.10-81,037.40

Finding the Fourth Proportional to 127,839.20, 191,540.10 and 81,037.40

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Solution

The fourth proportional to 127,839.20, 191,540.10 and 81,037.40 is: 121,417.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,839.20 : 191,540.10 = 81,037.40 : x
  2. Step 2: Convert to fraction form
    127,839.20/191,540.10 = 81,037.40/x
  3. Step 3: Cross multiply
    127,839.20x = 191,540.10 × 81,037.40
  4. Step 4: Simplify right side
    127,839.20x = 15,521,911,699.74
  5. Step 5: Solve for x
    x = 15,521,911,699.74/127,839.20
  6. Step 6: Final answer
    x = 121,417.47

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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.