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Finding the Fourth Proportional to 345,671.88, 518,507.16 and 135,162.18

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Solution

The fourth proportional to 345,671.88, 518,507.16 and 135,162.18 is: 202,743.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,671.88 : 518,507.16 = 135,162.18 : x
  2. Step 2: Convert to fraction form
    345,671.88/518,507.16 = 135,162.18/x
  3. Step 3: Cross multiply
    345,671.88x = 518,507.16 × 135,162.18
  4. Step 4: Simplify right side
    345,671.88x = 70,082,558,091.21
  5. Step 5: Solve for x
    x = 70,082,558,091.21/345,671.88
  6. Step 6: Final answer
    x = 202,743.01

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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.