Home / 127,719.80-191,579.70-81,025.40

Finding the Fourth Proportional to 127,719.80, 191,579.70 and 81,025.40

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Solution

The fourth proportional to 127,719.80, 191,579.70 and 81,025.40 is: 121,538.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,719.80 : 191,579.70 = 81,025.40 : x
  2. Step 2: Convert to fraction form
    127,719.80/191,579.70 = 81,025.40/x
  3. Step 3: Cross multiply
    127,719.80x = 191,579.70 × 81,025.40
  4. Step 4: Simplify right side
    127,719.80x = 15,522,821,824.38
  5. Step 5: Solve for x
    x = 15,522,821,824.38/127,719.80
  6. Step 6: Final answer
    x = 121,538.10

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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.