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Finding the Fourth Proportional to 90,855.75, 136,195.08 and 43,458.47

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Solution

The fourth proportional to 90,855.75, 136,195.08 and 43,458.47 is: 65,145.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,855.75 : 136,195.08 = 43,458.47 : x
  2. Step 2: Convert to fraction form
    90,855.75/136,195.08 = 43,458.47/x
  3. Step 3: Cross multiply
    90,855.75x = 136,195.08 × 43,458.47
  4. Step 4: Simplify right side
    90,855.75x = 5,918,829,117.35
  5. Step 5: Solve for x
    x = 5,918,829,117.35/90,855.75
  6. Step 6: Final answer
    x = 65,145.34

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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.