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Finding the Fourth Proportional to 125,358.28, 172,991.46 and 68,769.16

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Solution

The fourth proportional to 125,358.28, 172,991.46 and 68,769.16 is: 94,899.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,358.28 : 172,991.46 = 68,769.16 : x
  2. Step 2: Convert to fraction form
    125,358.28/172,991.46 = 68,769.16/x
  3. Step 3: Cross multiply
    125,358.28x = 172,991.46 × 68,769.16
  4. Step 4: Simplify right side
    125,358.28x = 11,896,477,391.37
  5. Step 5: Solve for x
    x = 11,896,477,391.37/125,358.28
  6. Step 6: Final answer
    x = 94,899.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.