Home / 126,087.16-189,135.06-42,979

Finding the Fourth Proportional to 126,087.16, 189,135.06 and 42,979

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Solution

The fourth proportional to 126,087.16, 189,135.06 and 42,979 is: 64,469.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,087.16 : 189,135.06 = 42,979 : x
  2. Step 2: Convert to fraction form
    126,087.16/189,135.06 = 42,979/x
  3. Step 3: Cross multiply
    126,087.16x = 189,135.06 × 42,979
  4. Step 4: Simplify right side
    126,087.16x = 8,128,835,743.74
  5. Step 5: Solve for x
    x = 8,128,835,743.74/126,087.16
  6. Step 6: Final answer
    x = 64,469.97

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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.