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Finding the Fourth Proportional to 90,598.35, 135,900.35 and 43,218.57

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Solution

The fourth proportional to 90,598.35, 135,900.35 and 43,218.57 is: 64,829.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,598.35 : 135,900.35 = 43,218.57 : x
  2. Step 2: Convert to fraction form
    90,598.35/135,900.35 = 43,218.57/x
  3. Step 3: Cross multiply
    90,598.35x = 135,900.35 × 43,218.57
  4. Step 4: Simplify right side
    90,598.35x = 5,873,418,573.41
  5. Step 5: Solve for x
    x = 5,873,418,573.41/90,598.35
  6. Step 6: Final answer
    x = 64,829.20

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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.