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Finding the Fourth Proportional to 123,045.28, 184,415.64 and 87,449.86

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Solution

The fourth proportional to 123,045.28, 184,415.64 and 87,449.86 is: 131,066.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,045.28 : 184,415.64 = 87,449.86 : x
  2. Step 2: Convert to fraction form
    123,045.28/184,415.64 = 87,449.86/x
  3. Step 3: Cross multiply
    123,045.28x = 184,415.64 × 87,449.86
  4. Step 4: Simplify right side
    123,045.28x = 16,127,121,899.81
  5. Step 5: Solve for x
    x = 16,127,121,899.81/123,045.28
  6. Step 6: Final answer
    x = 131,066.56

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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.