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Finding the Fourth Proportional to 225,300.64, 310,929.89 and 129,813.49

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Solution

The fourth proportional to 225,300.64, 310,929.89 and 129,813.49 is: 179,151.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,300.64 : 310,929.89 = 129,813.49 : x
  2. Step 2: Convert to fraction form
    225,300.64/310,929.89 = 129,813.49/x
  3. Step 3: Cross multiply
    225,300.64x = 310,929.89 × 129,813.49
  4. Step 4: Simplify right side
    225,300.64x = 40,362,892,887.03
  5. Step 5: Solve for x
    x = 40,362,892,887.03/225,300.64
  6. Step 6: Final answer
    x = 179,151.26

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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.