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Finding the Fourth Proportional to 136,479.48, 204,738.36 and 47,712.80

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Solution

The fourth proportional to 136,479.48, 204,738.36 and 47,712.80 is: 71,575.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,479.48 : 204,738.36 = 47,712.80 : x
  2. Step 2: Convert to fraction form
    136,479.48/204,738.36 = 47,712.80/x
  3. Step 3: Cross multiply
    136,479.48x = 204,738.36 × 47,712.80
  4. Step 4: Simplify right side
    136,479.48x = 9,768,639,160.75
  5. Step 5: Solve for x
    x = 9,768,639,160.75/136,479.48
  6. Step 6: Final answer
    x = 71,575.88

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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.