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Finding the Fourth Proportional to 221,840.70, 306,171.90 and 126,356.28

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Solution

The fourth proportional to 221,840.70, 306,171.90 and 126,356.28 is: 174,389.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,840.70 : 306,171.90 = 126,356.28 : x
  2. Step 2: Convert to fraction form
    221,840.70/306,171.90 = 126,356.28/x
  3. Step 3: Cross multiply
    221,840.70x = 306,171.90 × 126,356.28
  4. Step 4: Simplify right side
    221,840.70x = 38,686,742,324.53
  5. Step 5: Solve for x
    x = 38,686,742,324.53/221,840.70
  6. Step 6: Final answer
    x = 174,389.74

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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.