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Finding the Fourth Proportional to 345,448.79, 518,173.17 and 134,939.10

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Solution

The fourth proportional to 345,448.79, 518,173.17 and 134,939.10 is: 202,408.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,448.79 : 518,173.17 = 134,939.10 : x
  2. Step 2: Convert to fraction form
    345,448.79/518,173.17 = 134,939.10/x
  3. Step 3: Cross multiply
    345,448.79x = 518,173.17 × 134,939.10
  4. Step 4: Simplify right side
    345,448.79x = 69,921,821,203.95
  5. Step 5: Solve for x
    x = 69,921,821,203.95/345,448.79
  6. Step 6: Final answer
    x = 202,408.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.