Home / 127,817.20-191,507.10-81,015.40

Finding the Fourth Proportional to 127,817.20, 191,507.10 and 81,015.40

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Solution

The fourth proportional to 127,817.20, 191,507.10 and 81,015.40 is: 121,384.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,817.20 : 191,507.10 = 81,015.40 : x
  2. Step 2: Convert to fraction form
    127,817.20/191,507.10 = 81,015.40/x
  3. Step 3: Cross multiply
    127,817.20x = 191,507.10 × 81,015.40
  4. Step 4: Simplify right side
    127,817.20x = 15,515,024,309.34
  5. Step 5: Solve for x
    x = 15,515,024,309.34/127,817.20
  6. Step 6: Final answer
    x = 121,384.48

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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.