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Finding the Fourth Proportional to 243,009.20, 364,513.80 and 124,911.20

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Solution

The fourth proportional to 243,009.20, 364,513.80 and 124,911.20 is: 187,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,009.20 : 364,513.80 = 124,911.20 : x
  2. Step 2: Convert to fraction form
    243,009.20/364,513.80 = 124,911.20/x
  3. Step 3: Cross multiply
    243,009.20x = 364,513.80 × 124,911.20
  4. Step 4: Simplify right side
    243,009.20x = 45,531,856,174.56
  5. Step 5: Solve for x
    x = 45,531,856,174.56/243,009.20
  6. Step 6: Final answer
    x = 187,366.80

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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.