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Finding the Fourth Proportional to 154,862.76, 213,720.84 and 86,884.56

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Solution

The fourth proportional to 154,862.76, 213,720.84 and 86,884.56 is: 119,906.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,862.76 : 213,720.84 = 86,884.56 : x
  2. Step 2: Convert to fraction form
    154,862.76/213,720.84 = 86,884.56/x
  3. Step 3: Cross multiply
    154,862.76x = 213,720.84 × 86,884.56
  4. Step 4: Simplify right side
    154,862.76x = 18,569,041,146.23
  5. Step 5: Solve for x
    x = 18,569,041,146.23/154,862.76
  6. Step 6: Final answer
    x = 119,906.43

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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.