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Finding the Fourth Proportional to 90,622.89, 135,990.47 and 52,690.01

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Solution

The fourth proportional to 90,622.89, 135,990.47 and 52,690.01 is: 79,067.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,622.89 : 135,990.47 = 52,690.01 : x
  2. Step 2: Convert to fraction form
    90,622.89/135,990.47 = 52,690.01/x
  3. Step 3: Cross multiply
    90,622.89x = 135,990.47 × 52,690.01
  4. Step 4: Simplify right side
    90,622.89x = 7,165,339,695.91
  5. Step 5: Solve for x
    x = 7,165,339,695.91/90,622.89
  6. Step 6: Final answer
    x = 79,067.66

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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.