Home / 127,816.40-191,724.60-81,275.60

Finding the Fourth Proportional to 127,816.40, 191,724.60 and 81,275.60

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Solution

The fourth proportional to 127,816.40, 191,724.60 and 81,275.60 is: 121,913.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,816.40 : 191,724.60 = 81,275.60 : x
  2. Step 2: Convert to fraction form
    127,816.40/191,724.60 = 81,275.60/x
  3. Step 3: Cross multiply
    127,816.40x = 191,724.60 × 81,275.60
  4. Step 4: Simplify right side
    127,816.40x = 15,582,531,899.76
  5. Step 5: Solve for x
    x = 15,582,531,899.76/127,816.40
  6. Step 6: Final answer
    x = 121,913.40

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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.