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Finding the Fourth Proportional to 90,645, 135,870.30 and 43,794.60

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Solution

The fourth proportional to 90,645, 135,870.30 and 43,794.60 is: 65,644.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,645 : 135,870.30 = 43,794.60 : x
  2. Step 2: Convert to fraction form
    90,645/135,870.30 = 43,794.60/x
  3. Step 3: Cross multiply
    90,645x = 135,870.30 × 43,794.60
  4. Step 4: Simplify right side
    90,645x = 5,950,385,440.38
  5. Step 5: Solve for x
    x = 5,950,385,440.38/90,645
  6. Step 6: Final answer
    x = 65,644.94

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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.