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Finding the Fourth Proportional to 154,086.51, 230,811.39 and 90,711.39

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Solution

The fourth proportional to 154,086.51, 230,811.39 and 90,711.39 is: 135,879.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,086.51 : 230,811.39 = 90,711.39 : x
  2. Step 2: Convert to fraction form
    154,086.51/230,811.39 = 90,711.39/x
  3. Step 3: Cross multiply
    154,086.51x = 230,811.39 × 90,711.39
  4. Step 4: Simplify right side
    154,086.51x = 20,937,222,014.73
  5. Step 5: Solve for x
    x = 20,937,222,014.73/154,086.51
  6. Step 6: Final answer
    x = 135,879.66

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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.