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Finding the Fourth Proportional to 89,836.40, 134,495.40 and 80,505.20

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Solution

The fourth proportional to 89,836.40, 134,495.40 and 80,505.20 is: 120,525.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,836.40 : 134,495.40 = 80,505.20 : x
  2. Step 2: Convert to fraction form
    89,836.40/134,495.40 = 80,505.20/x
  3. Step 3: Cross multiply
    89,836.40x = 134,495.40 × 80,505.20
  4. Step 4: Simplify right side
    89,836.40x = 10,827,579,076.08
  5. Step 5: Solve for x
    x = 10,827,579,076.08/89,836.40
  6. Step 6: Final answer
    x = 120,525.52

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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.