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Finding the Fourth Proportional to 135,080.79, 186,420.32 and 89,687.71

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Solution

The fourth proportional to 135,080.79, 186,420.32 and 89,687.71 is: 123,774.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,080.79 : 186,420.32 = 89,687.71 : x
  2. Step 2: Convert to fraction form
    135,080.79/186,420.32 = 89,687.71/x
  3. Step 3: Cross multiply
    135,080.79x = 186,420.32 × 89,687.71
  4. Step 4: Simplify right side
    135,080.79x = 16,719,611,598.27
  5. Step 5: Solve for x
    x = 16,719,611,598.27/135,080.79
  6. Step 6: Final answer
    x = 123,774.90

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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.