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Finding the Fourth Proportional to 273,989.88, 378,104.64 and 153,131.10

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Solution

The fourth proportional to 273,989.88, 378,104.64 and 153,131.10 is: 211,320.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,989.88 : 378,104.64 = 153,131.10 : x
  2. Step 2: Convert to fraction form
    273,989.88/378,104.64 = 153,131.10/x
  3. Step 3: Cross multiply
    273,989.88x = 378,104.64 × 153,131.10
  4. Step 4: Simplify right side
    273,989.88x = 57,899,579,438.30
  5. Step 5: Solve for x
    x = 57,899,579,438.30/273,989.88
  6. Step 6: Final answer
    x = 211,320.14

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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.