Home / 127,838.20-191,538.60-81,036.40

Finding the Fourth Proportional to 127,838.20, 191,538.60 and 81,036.40

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Solution

The fourth proportional to 127,838.20, 191,538.60 and 81,036.40 is: 121,415.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,838.20 : 191,538.60 = 81,036.40 : x
  2. Step 2: Convert to fraction form
    127,838.20/191,538.60 = 81,036.40/x
  3. Step 3: Cross multiply
    127,838.20x = 191,538.60 × 81,036.40
  4. Step 4: Simplify right side
    127,838.20x = 15,521,598,605.04
  5. Step 5: Solve for x
    x = 15,521,598,605.04/127,838.20
  6. Step 6: Final answer
    x = 121,415.97

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1.5x scale

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.