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Finding the Fourth Proportional to 154,634.54, 213,395.51 and 86,652.05

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Solution

The fourth proportional to 154,634.54, 213,395.51 and 86,652.05 is: 119,579.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,634.54 : 213,395.51 = 86,652.05 : x
  2. Step 2: Convert to fraction form
    154,634.54/213,395.51 = 86,652.05/x
  3. Step 3: Cross multiply
    154,634.54x = 213,395.51 × 86,652.05
  4. Step 4: Simplify right side
    154,634.54x = 18,491,157,551.95
  5. Step 5: Solve for x
    x = 18,491,157,551.95/154,634.54
  6. Step 6: Final answer
    x = 119,579.74

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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.