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Finding the Fourth Proportional to 90,773.64, 136,160.52 and 28,449

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Solution

The fourth proportional to 90,773.64, 136,160.52 and 28,449 is: 42,673.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,773.64 : 136,160.52 = 28,449 : x
  2. Step 2: Convert to fraction form
    90,773.64/136,160.52 = 28,449/x
  3. Step 3: Cross multiply
    90,773.64x = 136,160.52 × 28,449
  4. Step 4: Simplify right side
    90,773.64x = 3,873,630,633.48
  5. Step 5: Solve for x
    x = 3,873,630,633.48/90,773.64
  6. Step 6: Final answer
    x = 42,673.52

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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.