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Finding the Fourth Proportional to 99,990.66, 150,059.67 and 47,399.94

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Solution

The fourth proportional to 99,990.66, 150,059.67 and 47,399.94 is: 71,134.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,990.66 : 150,059.67 = 47,399.94 : x
  2. Step 2: Convert to fraction form
    99,990.66/150,059.67 = 47,399.94/x
  3. Step 3: Cross multiply
    99,990.66x = 150,059.67 × 47,399.94
  4. Step 4: Simplify right side
    99,990.66x = 7,112,819,354.42
  5. Step 5: Solve for x
    x = 7,112,819,354.42/99,990.66
  6. Step 6: Final answer
    x = 71,134.84

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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.