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Finding the Fourth Proportional to 99,783.28, 149,694.64 and 36,603.99

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Solution

The fourth proportional to 99,783.28, 149,694.64 and 36,603.99 is: 54,913.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,783.28 : 149,694.64 = 36,603.99 : x
  2. Step 2: Convert to fraction form
    99,783.28/149,694.64 = 36,603.99/x
  3. Step 3: Cross multiply
    99,783.28x = 149,694.64 × 36,603.99
  4. Step 4: Simplify right side
    99,783.28x = 5,479,421,105.61
  5. Step 5: Solve for x
    x = 5,479,421,105.61/99,783.28
  6. Step 6: Final answer
    x = 54,913.22

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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.