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Finding the Fourth Proportional to 225,156.11, 310,729.21 and 129,693.56

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Solution

The fourth proportional to 225,156.11, 310,729.21 and 129,693.56 is: 178,985.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,156.11 : 310,729.21 = 129,693.56 : x
  2. Step 2: Convert to fraction form
    225,156.11/310,729.21 = 129,693.56/x
  3. Step 3: Cross multiply
    225,156.11x = 310,729.21 × 129,693.56
  4. Step 4: Simplify right side
    225,156.11x = 40,299,575,563.01
  5. Step 5: Solve for x
    x = 40,299,575,563.01/225,156.11
  6. Step 6: Final answer
    x = 178,985.04

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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.