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Finding the Fourth Proportional to 128,019.60, 191,867.40 and 49,028.40

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Solution

The fourth proportional to 128,019.60, 191,867.40 and 49,028.40 is: 73,480.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,019.60 : 191,867.40 = 49,028.40 : x
  2. Step 2: Convert to fraction form
    128,019.60/191,867.40 = 49,028.40/x
  3. Step 3: Cross multiply
    128,019.60x = 191,867.40 × 49,028.40
  4. Step 4: Simplify right side
    128,019.60x = 9,406,951,634.16
  5. Step 5: Solve for x
    x = 9,406,951,634.16/128,019.60
  6. Step 6: Final answer
    x = 73,480.56

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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.