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Finding the Fourth Proportional to 242,551.20, 334,745.28 and 135,138.72

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Solution

The fourth proportional to 242,551.20, 334,745.28 and 135,138.72 is: 186,505.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,551.20 : 334,745.28 = 135,138.72 : x
  2. Step 2: Convert to fraction form
    242,551.20/334,745.28 = 135,138.72/x
  3. Step 3: Cross multiply
    242,551.20x = 334,745.28 × 135,138.72
  4. Step 4: Simplify right side
    242,551.20x = 45,237,048,665.24
  5. Step 5: Solve for x
    x = 45,237,048,665.24/242,551.20
  6. Step 6: Final answer
    x = 186,505.15

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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.