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Finding the Fourth Proportional to 90,125.66, 135,147.49 and 47,994.93

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Solution

The fourth proportional to 90,125.66, 135,147.49 and 47,994.93 is: 71,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,125.66 : 135,147.49 = 47,994.93 : x
  2. Step 2: Convert to fraction form
    90,125.66/135,147.49 = 47,994.93/x
  3. Step 3: Cross multiply
    90,125.66x = 135,147.49 × 47,994.93
  4. Step 4: Simplify right side
    90,125.66x = 6,486,394,202.24
  5. Step 5: Solve for x
    x = 6,486,394,202.24/90,125.66
  6. Step 6: Final answer
    x = 71,970.56

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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.