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Finding the Fourth Proportional to 147,639.84, 203,742.72 and 80,571.84

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Solution

The fourth proportional to 147,639.84, 203,742.72 and 80,571.84 is: 111,189.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,639.84 : 203,742.72 = 80,571.84 : x
  2. Step 2: Convert to fraction form
    147,639.84/203,742.72 = 80,571.84/x
  3. Step 3: Cross multiply
    147,639.84x = 203,742.72 × 80,571.84
  4. Step 4: Simplify right side
    147,639.84x = 16,415,925,837.00
  5. Step 5: Solve for x
    x = 16,415,925,837.00/147,639.84
  6. Step 6: Final answer
    x = 111,189.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.