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Finding the Fourth Proportional to 154,480.88, 213,186.86 and 87,412.88

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Solution

The fourth proportional to 154,480.88, 213,186.86 and 87,412.88 is: 120,631.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,480.88 : 213,186.86 = 87,412.88 : x
  2. Step 2: Convert to fraction form
    154,480.88/213,186.86 = 87,412.88/x
  3. Step 3: Cross multiply
    154,480.88x = 213,186.86 × 87,412.88
  4. Step 4: Simplify right side
    154,480.88x = 18,635,275,907.76
  5. Step 5: Solve for x
    x = 18,635,275,907.76/154,480.88
  6. Step 6: Final answer
    x = 120,631.61

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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.