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Finding the Fourth Proportional to 99,790.76, 149,606.61 and 57,622.97

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Solution

The fourth proportional to 99,790.76, 149,606.61 and 57,622.97 is: 86,388.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,790.76 : 149,606.61 = 57,622.97 : x
  2. Step 2: Convert to fraction form
    99,790.76/149,606.61 = 57,622.97/x
  3. Step 3: Cross multiply
    99,790.76x = 149,606.61 × 57,622.97
  4. Step 4: Simplify right side
    99,790.76x = 8,620,777,199.83
  5. Step 5: Solve for x
    x = 8,620,777,199.83/99,790.76
  6. Step 6: Final answer
    x = 86,388.53

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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.