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Finding the Fourth Proportional to 225,347.21, 310,979.25 and 123,379.28

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Solution

The fourth proportional to 225,347.21, 310,979.25 and 123,379.28 is: 170,263.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,347.21 : 310,979.25 = 123,379.28 : x
  2. Step 2: Convert to fraction form
    225,347.21/310,979.25 = 123,379.28/x
  3. Step 3: Cross multiply
    225,347.21x = 310,979.25 × 123,379.28
  4. Step 4: Simplify right side
    225,347.21x = 38,368,395,343.04
  5. Step 5: Solve for x
    x = 38,368,395,343.04/225,347.21
  6. Step 6: Final answer
    x = 170,263.46

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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.