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Finding the Fourth Proportional to 246,643.72, 340,369.50 and 139,218.28

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Solution

The fourth proportional to 246,643.72, 340,369.50 and 139,218.28 is: 192,121.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    246,643.72 : 340,369.50 = 139,218.28 : x
  2. Step 2: Convert to fraction form
    246,643.72/340,369.50 = 139,218.28/x
  3. Step 3: Cross multiply
    246,643.72x = 340,369.50 × 139,218.28
  4. Step 4: Simplify right side
    246,643.72x = 47,385,656,354.46
  5. Step 5: Solve for x
    x = 47,385,656,354.46/246,643.72
  6. Step 6: Final answer
    x = 192,121.88

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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.