Home / 208,121.10-312,181.65-103,145.10

Finding the Fourth Proportional to 208,121.10, 312,181.65 and 103,145.10

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Solution

The fourth proportional to 208,121.10, 312,181.65 and 103,145.10 is: 154,717.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,121.10 : 312,181.65 = 103,145.10 : x
  2. Step 2: Convert to fraction form
    208,121.10/312,181.65 = 103,145.10/x
  3. Step 3: Cross multiply
    208,121.10x = 312,181.65 × 103,145.10
  4. Step 4: Simplify right side
    208,121.10x = 32,200,007,507.42
  5. Step 5: Solve for x
    x = 32,200,007,507.42/208,121.10
  6. Step 6: Final answer
    x = 154,717.65

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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.