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Finding the Fourth Proportional to 90,557.76, 135,582.30 and 73,589.88

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Solution

The fourth proportional to 90,557.76, 135,582.30 and 73,589.88 is: 110,178.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,557.76 : 135,582.30 = 73,589.88 : x
  2. Step 2: Convert to fraction form
    90,557.76/135,582.30 = 73,589.88/x
  3. Step 3: Cross multiply
    90,557.76x = 135,582.30 × 73,589.88
  4. Step 4: Simplify right side
    90,557.76x = 9,977,485,187.12
  5. Step 5: Solve for x
    x = 9,977,485,187.12/90,557.76
  6. Step 6: Final answer
    x = 110,178.14

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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.