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Finding the Fourth Proportional to 313,992.90, 471,098.70 and 136,627.20

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Solution

The fourth proportional to 313,992.90, 471,098.70 and 136,627.20 is: 204,988.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,992.90 : 471,098.70 = 136,627.20 : x
  2. Step 2: Convert to fraction form
    313,992.90/471,098.70 = 136,627.20/x
  3. Step 3: Cross multiply
    313,992.90x = 471,098.70 × 136,627.20
  4. Step 4: Simplify right side
    313,992.90x = 64,364,896,304.64
  5. Step 5: Solve for x
    x = 64,364,896,304.64/313,992.90
  6. Step 6: Final answer
    x = 204,988.38

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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.