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Finding the Fourth Proportional to 154,713.88, 213,505.15 and 87,645.88

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Solution

The fourth proportional to 154,713.88, 213,505.15 and 87,645.88 is: 120,951.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,713.88 : 213,505.15 = 87,645.88 : x
  2. Step 2: Convert to fraction form
    154,713.88/213,505.15 = 87,645.88/x
  3. Step 3: Cross multiply
    154,713.88x = 213,505.15 × 87,645.88
  4. Step 4: Simplify right side
    154,713.88x = 18,712,846,756.28
  5. Step 5: Solve for x
    x = 18,712,846,756.28/154,713.88
  6. Step 6: Final answer
    x = 120,951.31

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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.