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Finding the Fourth Proportional to 125,358.53, 172,991.81 and 68,769.41

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Solution

The fourth proportional to 125,358.53, 172,991.81 and 68,769.41 is: 94,900.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,358.53 : 172,991.81 = 68,769.41 : x
  2. Step 2: Convert to fraction form
    125,358.53/172,991.81 = 68,769.41/x
  3. Step 3: Cross multiply
    125,358.53x = 172,991.81 × 68,769.41
  4. Step 4: Simplify right side
    125,358.53x = 11,896,544,364.69
  5. Step 5: Solve for x
    x = 11,896,544,364.69/125,358.53
  6. Step 6: Final answer
    x = 94,900.16

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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.