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Finding the Fourth Proportional to 207,937.10, 311,127.15 and 148,103.90

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Solution

The fourth proportional to 207,937.10, 311,127.15 and 148,103.90 is: 221,601.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,937.10 : 311,127.15 = 148,103.90 : x
  2. Step 2: Convert to fraction form
    207,937.10/311,127.15 = 148,103.90/x
  3. Step 3: Cross multiply
    207,937.10x = 311,127.15 × 148,103.90
  4. Step 4: Simplify right side
    207,937.10x = 46,079,144,310.89
  5. Step 5: Solve for x
    x = 46,079,144,310.89/207,937.10
  6. Step 6: Final answer
    x = 221,601.36

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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.