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Finding the Fourth Proportional to 128,016.36, 191,959.92 and 74,726.64

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Solution

The fourth proportional to 128,016.36, 191,959.92 and 74,726.64 is: 112,052.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,016.36 : 191,959.92 = 74,726.64 : x
  2. Step 2: Convert to fraction form
    128,016.36/191,959.92 = 74,726.64/x
  3. Step 3: Cross multiply
    128,016.36x = 191,959.92 × 74,726.64
  4. Step 4: Simplify right side
    128,016.36x = 14,344,519,836.27
  5. Step 5: Solve for x
    x = 14,344,519,836.27/128,016.36
  6. Step 6: Final answer
    x = 112,052.24

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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.